NJW4108 Lithium-ion Battery Charger Controller IC with Timer GENERAL DESCRIPTION PACKAGE OUTLINE The NJW4108 is a Lithium-ion Battery Charger Controller IC with over charger timer. Charger current and voltage can individually be set by the external resistors. Therefore, it can be used for a wide range of battery cells for both 1-cell and 2-cell applications. It includes a lot of safety features for safety conscious design: Over voltage, Over discharge, temperature monitor and over charge timers. NJW4108V FEATURES Adjustable Charge Voltage Adjustable Pre-Charge and Full Charge Current Temperature Monitor Over Charge Timer Internal Re-Charge function Delay timers and Hysteresis inputs for high noise immunity Over Discharge Battery Detect Over Voltage Protection Bi-CMOS Technology Package Outline NJW4108V : SSOP20 PIN CONFIGURATION P-CHG 1 20 Q-CHG NFB 2 19 CS1 CNT 3 18 CS2 GND 4 17 VS NC 5 16 VREF F-CHG 6 15 V+ LED-G 7 14 TDET LED-R 8 13 TH C1 9 12 TL C2 10 11 CHG-SW NJW4108V Ver.2013-02-12 -1- NJW4108 ABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL Operating Voltage V+ C1 Pin Voltage VC1 C2 Pin Voltage VC2 TDET Pin Voltage VTDET CNT Pin Output Current ISINK-CNT LED-G Pin Output Current ISINK-G LED-R Pin Output Current ISINK-R Power Dissipation PD Operating Temperature Range TOPR Storage Temperature Range TSTG MAXIMUM RATINGS +15 +5 +5 +5 50 20 20 SSOP20 :300 -20 ~ +85 -40 ~ +125 UNIT V V V V mA mA mA mW C C ELECTRICAL CHARACTERISTICS (V+=5V, Ta=25C) PARAMETER General Characteristics Operating Voltage Operating Current SYMBOL VOP ICC TEST CONDITION CHG-SW: OPEN Under Voltage Lockout Block ON Threshold Voltage OFF Threshold Voltage Hysteresis Voltage VT-ON VT-OFF VHYS Reference Voltage Block Reference Voltage Load Regulation VREF VREF IREF=0mA IREF=0mA~1mA Quick Charge Detection Voltage VQ-CHG VS: LH Re-Charge Detection Voltage VR-CHG VS: HL VOV VS: LH MIN. TYP. MAX. UNIT - - - 2 14 3 V mA 2.2 2.0 100 2.4 2.2 200 2.6 2.4 300 V V mV 1.228 - 1.24 - 1.253 10 V mV Voltage Detection Block Over Voltage Detection Voltage Charge Control Block Reference Voltage VS Pin Input Bias Current Battery Connected Detection Voltage VREF-CV VS Pin V V V 4.17 4.2 4.23 V IVS VS=4.2V - 50 500 nA VT-TDET TDET Pin - 1.15 - V Low Voltage Detection (2mA Charge) Block Charge Current ICHG1 VS=1V Low Voltage Detection Voltage VS: LH -2- VBAT VBAT VBAT x 0.71 x 0.73 x 0.75 VBAT VBAT VBAT x 0.94 x 0.95 x 0.96 VBAT VBAT VBAT x 1.015 x 1.025 x 1.035 VLV 1 2 3 VBAT VBAT VBAT x 0.455 x 0.475 x 0.495 mA V Ver.2013-02-12 NJW4108 ELECTRICAL CHARACTERISTICS (V+=5V, Ta=25C) PARAMETER Current Detection Block Pre-Charge /Quick Charge Block Voltage Gain Full Charge Block Voltage Gain F-CHG Pin Input Voltage Range CS1 Pin Input Bias Current CS2 Pin Input Bias Current SYMBOL AV1 AV2 VF-CHG ICS1 ICS2 TEST CONDITION MIN. TYP. MAX. UNIT CS1=3.8V, CS2=3.6V 11.5 12 12.5 dB CS2=VS=4.2V, VF-CHG=96mV CS2=VS=4.2V CS1=4.2V CS2=4.2V 15.5 48 - - 18 - 10 10 21 - 500 500 dB mV nA nA - - 0.2 - 0.5 1 V A 0.512 1.024 2.048 ms - - - - 0.2 - 0.2 - 0.5 1 0.5 1 V A V A -10 -10 - - +10 +10 % % - 1 300 - - 500 0.25 - 700 V V k Output Block CNT Pin Saturation Voltage CNT Pin Leak Current VOL-CNT I SINK=20mA ILEAK-CNT V+=14V Temperature Detection Block Abnormal Temperature LED Blinking TBLINK-G VTL>VTDET, VTDET<VTH ,T=4s LED Out Block LED-G Pin Saturation Voltage LED-G Pin Leak Current LED-R Pin Saturation Voltage LED-R Pin Leak Current VOL-G ILEAK-G VOL-R ILEAK-R I SINK=10mA V+=14V I SINK=10mA V+=14V Timer Block OSC1 Timer Error Time OSC2 Timer Error Time T1 T2 CHG-SW Block ON Threshold Voltage OFF Threshold Voltage Pull-up Resistance VSW-ON VSW-OFF RPULL-UP Ver.2013-02-12 C1=C2=0.01F external Not including external deviation -3- NJW4108 TYPICAL APPLICATION Input VREF CS2 RP1 RQ1 RP2 RQ2 + NFB Q-CHG Pre-Charge Control P-CHG Quick Charge Control V CNT 12dB VREF Reference Voltage 1 1.24V VREF1 CS1 Rcs CS2 CVCC-ON RB1 Reference Voltage 2 4.2V VREF2 CVCC-ON Quick/ Pre-Charge GND CVCC-ON Charge ON/OFF CS1 pin 2mA Charge C1 C2 OSC 1 OSC 2 PreCharge Timer Full Charge Timer F-CHG Full Charge Detection 6dB Re-Charge Battery Voltage Detection Time Out Time Out RF2 VBAT x 0.95 VBAT x 1.025 Low Voltage Detection VBAT x 0.475 VREF TDET Low Temperature Detection Temp. Detection TH High Temperature Detection LED-G TL Charge -ON LED-G + LED-R VREF RF1 VBAT x 0.73 Over Voltage Detection Start/Stop Start/Stop RB1Short RB2Open RB2 Quick Charge CLK When is -cell VS VREF2 V Battery Connected Detection LED-R Control Logic RPULL-UP UVLO + V Lithium Ion Battery GND CHG-SW -4- Ver.2013-02-12 NJW4108 PIN CONFIGULATION Pin No. Pin Name 1 P-CHG 2 NFB 3 CNT 4 GND 5 NC 6 F-CHG 7 LED-G 8 LED-R 9 C1 10 C2 11 CHG-SW 12 TL 13 TH 14 TDET 15 V+ 16 VREF 17 VS 18 CS2 19 CS1 20 Q-CHG Function Pre-Charge Current Setting Current-Regulation-Loop Compensation Charge Control for Output Pin (External PNP Transistor) GND Full Charge Current Setting LED Output LED Output Pre-Charge Timer, 2mA Charge Timer, LED Blinking Cycle, Delay Time Setting Quick Timer Setting Charge ON/OFF Control Batteries Thermal (High Temperature) Setting Batteries Thermal (Low Temperature) Setting Battery Temperature Detection, Battery Connected Detection Operating Voltage Reference Voltage Output Battery Voltage Detection Charge Current Detection 2 Charge Current Detection 1 Quick Charge Current Setting CHARGE VOLTAGE / CURRENT for RESISTANCE SETTING Parameter Calculation formula Examples of calculation Charge Control Voltage RB1 + RB2 x VREF-CV (4.2V) VBAT = RB2 4.2V 8.4V Low Voltage Detection Voltage Quick Charge Start Voltage Re-Charge Detection Voltage Over Voltage Detection Voltage VBAT x 0.475 VBAT x 0.73 VBAT x 0.95 VBAT x 1.025 2.00V 3.07V 3.99V 4.305V 3.99V 6.13V 7.98V 8.61V Pre-Charge Current Quick Charge Current Full Charge Current Ver.2013-02-12 RP2 x VREF (1.24V) / 4) / RCS RP1 + RP2 (at. RP1:232k, RP2:16k, RCS=0.2) RQ2 IQ-CHG = ( x VREF (1.24V) / 4) / RCS RQ1 + RQ2 (at. RQ1:128k, RQ2:120k, RCS=0.2) RF2 IF-CHG = ( x VREF (1.24V) / 8) / RCS RF1 + RF2 (at. RF1:114.4k, RF2:9.6k, RCS=0.2) IP-CHG = ( 100mA 750mA 60mA -5- NJW4108 TYPICAL CHARACTERISTICS Reference Voltage vs. Temperature Charge Control Block Reference Voltage + vs. Temperature (V+=5V, VS Pin) 1.245 Reference Voltage (V) V 4.24 REF-CV 4.22 1.24 1.235 4.2 4.18 1.23 1.225 4.16 4.14 -50 (V =5V, IREF=0mA) 1.25 Reference Voltage VREF (V) 4.26 -25 0 25 50 75 1.22 -50 100 125 o Ambient Temperature Ta ( C) Pre-Charge/Quick Charge Block Voltage Gain -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) CHG-SW Block Threshold Voltage + 12.4 0.7 Threshold Voltage (V) 0.8 Pre-Charge/Quick Charge Block Voltage Gain AV1 (dB) vs. Temperature (V =5V, CS1=3.8V, CS2=3.6V) 12.6 12.2 12 11.8 11.6 11.4 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) vs. Temperature (V+=5V) V 0.6 SW_OFF 0.5 0.4 VSW_ON 0.3 0.2 -50 -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Operating Current vs. Temperature Operating Current ICC (mA) 3 2.5 2 1.5 1 0.5 0 -50 -6- (V+=5V, CHG-SW:OPEN) -25 0 25 50 75 100 125 o Ambient Temperature Ta ( C) Ver.2013-02-12 NJW4108 TYPICAL CHARACTERISTICS CNT Pin Saturation Voltage vs. Sink Current LED Pin Saturation Voltage vs. Sink Current (V+=5V, Ta=25oC) (V+=5V, Ta=25oC) 0.5 Saturation Voltage VOL (V) Saturation Voltage VOL-CNT (V) 0.5 0.4 0.3 0.2 0.1 0 0 10 20 30 40 Sink Current ISINK (mA) 0.4 0.3 0.2 LED-R 0.1 LED-G 0 50 0 5 10 15 Sink Current ISINK (mA) Oscillation Cycle vs. Temperature (V+=5V, Ta=25oC) 10 1 0.001 Ver.2013-02-12 0.01 Capacitance C1, C2 (F) 0.1 Oscillation Cycle OSC1, OSC2 (ms) Oscillation Cycle OSC1, OSC2 (ms) Oscillation Cycle vs. Capacitance 100 20 14 (V+=5V, C1=C2=0.01F) 13 12 11 10 9 8 7 6 -50 -25 0 25 50 75 100 125 Ambient Temperature Ta (oC) -7- NJW4108 FEATURE DESCRIPTION 1. Voltage Detection Block (VS pin) The VS pin determines charge voltage, low voltage, over voltage, and re-charge voltage. Battery voltage conditions are constantly monitored. (Figure 1) 1-1. Charge Voltage (VS pin) Charge voltage VBAT is set using the VS pin external resistors RB1 and RB2 and the following equation: VBAT = RB1 + RB2 x VREF-CV (4.2V) RB2 Using the following settings makes it easy to support applications for one or two cells: for one cell, RB1= short, and RB2= open; for two cells, RB1=RB2. If you use a high resistance, the VS pin's bias current will cause incorrect values. Use as low a resistance as possible. Charge Voltage Control Amp RB1 To OR Circuit VS VREF2 CVCC-ON RB2 Control Block Battery Voltage Detection Quick Charge Detection VBAT x 0.73 Recharge Detection VBAT x 0.95 Over Voltage Detection VBAT x 1.025 For 1 Cell RB1: Short RB2: Open To Charge Low Voltage Detection V x 0.475 1-2. Overcharge Detection Block (VS pin) The overcharge detection block stops charging when a Figure 1. Voltage Detection Block Configuration high voltage is detected at the VS pin. The overcharge detection voltage is obtained with the following equation: VOV=VBAT x 1.025 (typ.) When overcharge is detected, charging is prohibited and LED-R blinks. After that, charge will continue to be prohibited, even after battery voltage drops to a normal value. Turning the power off to release UVLO, battery connection detection, or CHG-SW switching will enable the charge sequence to restart. BAT 1-3. Low Voltage Detection (2mA charge) Block (VS pin, CS1 pin) The low voltage detection block detects an over-discharged battery, or an open battery caused by the battery protection circuit or the like. This will determine a 2mA charge prior to pre-charging. The low voltage detection voltage is obtained with the following equation: VLV=VBAT x 0.475 (typ.) During a 2mA charge, the block monitors battery voltage recovery while a steady 2mA current is output from the CS1 pin. (Figure 2) If voltage does not recover within a prescribed time, the timer will prohibit 2mA charging. Turning the power off to release UVLO, battery connection detection, or CHG-SW switching will enable the charge sequence to restart. 2mA Charge Current To Charge Current Control Amp 12dB CS1 Rcs 2mA Charge CS2 Low Voltage Detection Control Block VBAT x 0.475 RB1 VS RB2 To Charge Output Figure 2. 2mA Charging Block 1-4. Re-Charge Detection (VS pin) When a fully charged battery is left for a long period of time, voltage will drop due to self-discharge. The re-charge detection block detects a drop in voltage and re-charges the battery. The re-charge detection voltage is obtained with the following equation. VR-CHG=VBAT x 0.95 (typ.) -8- Ver.2013-02-12 NJW4108 FEATURE DESCRIPTION (CONTINUED) 2. Current Detection Block (CS1 pin, CS2 pin) A current detection resistor RCS is inserted between pin CS1 and pin CS2 to monitor battery charge current. The input voltage between pin CS1 and pin CS2 is amplified by the 12dB current detection amp and fed back to the charge current control amp. (Figure 3) 2-1. Pre-Charge Current, Quick Charge Current (P-CHG pin, Q-CHG pin) This will switch between charging with pre-charge current or quick charge current according to the level of the battery voltage VBAT that is input from the VS pin. VBAT x 0.475 to VBAT x 0.73 VBAT x 0.73 to VBAT Pre-charge control Quick charge control Pre-charge and quick charge current values are determined by the P-CHG pin and the Q-CHG pin voltage settings. Settings are made according to the following formulae. VREF RP2 x VREF (1.24V) / 4) / RCS RP1 + RP2 NFB Quick Charge Current Value IQ-CHG = ( RQ2 x VREF (1.24V) / 4) / RCS RQ1 + RQ2 Charge Current Control Amp RP1 RQ1 RP2 RQ2 P-CHG Q-CHG Pre-Charge Current Setting IP-CHG = ( CS2 Quick Charge Current Setting Pre-Charge Current Value 12dB To OR Circuit 2-2. Full Charge Detection (F-CHG pin) Charge termination is determined by a set full charge current IF-CHG., which is determined by a voltage setting on the F-CHG pin. IF-CHG = ( RF2 x VREF (1.24V) / 8) / RCS RF1 + RF2 When charging is terminated, LED-G turns on, and the sequence moves to the re-charge detection operation. CVCC-ON To Charge Voltage Control Amp Switch Pre/Quick Charge Current CS1 Rcs CS2 RB1 VS RB2 Quick/ Pre-Charge F-CHG Full Charge Detection Quick Charge Detection Control Block 6dB VBAT x 0.73 VREF RF1 RF2 To Charge Output Figure 3. Block for Controlling Pre-Charge, Quick Charge, and Block for Detecting Full Charge. Ver.2013-02-12 -9- NJW4108 FEATURE DESCRIPTION (CONTINUED) 3. Charge Control Output Block (CNT pin) A PNP transistor connected to the CNT pin controls the voltage and current required to charge the battery. When the CHG-SW pin and battery-connected detection are both ON the system moves to charge control mode. If battery voltage and temperature conditions are appropriate, charging will begin. During 2mA charging the PNP transistor will go to OFF status. 4. Temperature Detection Block, Battery Connected Detection Block (TDET pin, TH pin, TL pin) The charge temperature range is set with the TL pin (high temperature) and the TH pin (low temperature). The threshold voltage for the temperature detection comparator is set with the external resistors RTHL, RTH, RTL. Therefore, you can select any type of thermistor (NTC) and any charge temperature range (Figure 4). The TL pin and the TH pin are set to go to the potential states shown below for fluctuations in TDET voltage. VTL (high temperature) < VTDET (charge Temperature) < VTH (low temperature) Pin voltages are obtained from the following formulae. TDET pin (thermistor setting) RT VTDET = x VREF(1.24 V ) RTDET + RT TH pin (low temperature setting) RTH + RTL VTH = x VREF(1.24 V ) RTHL + RTH + RTL VREF Low Temperature Detection Temp. Detection High Temperature Detection Charge -ON Battery Connected Detection TDET RTDET RTHL TH TL RTH RTL RT VT-TDET=1.15V To CHG-SW To UVLO TL pin (high temperature setting) R TL VTL = x VREF(1.24 V ) R THL + R TH + R TL Lithium Ion Battery Figure 4 Temperature Detection Block When the detected temperature goes out of the range of the set values, charging stops, and LED-G slow blinking and LED-R turn off. After temperature is restored, charging recommences in line with battery voltage status. The TDET pin is also used for the battery-connected detection feature. The battery-connected detection feature determines that a battery is connected if TDET pin voltage is no greater than 1.15V(typ.), and commences charging. - 10 - Ver.2013-02-12 NJW4108 FEATURE DESCRIPTION (CONTINUED) 5. Delay Circuits (each detection block) Each detection block has a delay circuit and extra features for preventing malfunction due to noise or excess signals. Table 1 Delay Circuits and Extra Features. Detection Block Delay Circuit Low Voltage Malfunction Prevention Circuit CHG-SW Battery Connected Detection Delay I Temperature Detection Full Charge Detection Re-Charge Detection Low Voltage Detection Over Voltage Detection Quick Charge Detection Delay II Extra Feature Hysteresis Hysteresis Hysteresis Hysteresis - - Hysteresis Latch Hysteresis The delay circuit block receives a signal from the timer circuit to fix a delay time. For details on the relationship between the delay time and capacitors see "6. Timer Circuit Block". 6. Timer Circuit Block (C1 pin, C2 pin) OSC1 is used for the timer that is used for pre-charge, 2mA charge and the like. OSC2 is used for the quick charge timer. You can change the time of the timers with external capacitors. Tables 2, 3 show the relationship between capacitance and time. Table 2 C1, C2 Oscillation Cycle t Capacitance (C1, C2) 4700pF 0.01F 0.022F 0.047F Table 3 Timer Time Block Name Pre-Charge Timer Quick Charge Timer Oscillation Cycle (OSC1, OSC2) t = 4.7ms t = 10ms t = 22ms t = 47ms Parameter 2mA Charge Timer Pre-Charge Timer LED R Blinking Cycle (Time out, Over voltage) LED G Blinking Cycle (Abnormal temperature) Delay I Delay II Quick Charge Timer Calculation Formula tx210 tx217 Examples 10.2s 22min. tx27 1.28s tx28 2.56s tx25 tx24 tx220 0.32s 0.16s 2hours 55 min. C1=0.01F C2=0.01F Use capacitors the have good temperature characteristics in the OSC block. Capacitor deviation will cause timer errors. Ver.2013-02-12 - 11 - NJW4108 FEATURE DESCRIPTION (CONTINUED) In each charge mode if time-over occurs charging is prohibited and LED-R blinks. Turning the power off to release UVLO, battery connection detection, or CHG-SW switching will enable the charge sequence to restart. NJW4108 incorporates a test mode that shortens the timer block function's test time by 1/150,000. To operate in test mode set the TH pin voltage to a value no greater than that of the TL pin. In test mode, regardless of the external timing capacitors C1, C2, the internal timer clock frequency will operate in a range of approximately 200kHz to 300kHz. The following shows calculation values when the oscillating frequency is 250kHz (4s cycle). Table 4. Timer Times in Test Mode. Block Name Pre-Charge Timer Quick Charge Timer Parameter 2mA Charge Timer Pre-Charge Timer LED R Blinking Cycle Delay I Delay II Quick Charge Timer Calculation Formula tx210 tx217 tx27 tx25 tx24 tx220 Example (t = Appx. 4s) Appx. 4ms Appx. 0.5s Appx. 0.5ms Appx. 0.13ms Appx. 64s Appx. 4.2s When the TDET pin voltage is approximately 1.2V or greater, the pre-charge / quick charge timers operate normally. If you want to further reduce the test time, setting TDET pin voltage makes it possible to run each of the timer counters divided in half. When the TDET pin is approximately 0.3V or less, the first half of the counter is bypassed. When the voltage is approximately greater than 0.4V and less than 1.1V, the second half of the counter is bypassed. Table 5. Reduced Test Time Mode Parameter Pre-Charge Timer Quick Charge Timer - 12 - Calculation Formula tx28 , tx28 tx29 , tx210 Example (t =Appx. 4s) Appx. 1ms, Appx. 1ms Appx. 2ms, Appx. 4ms Ver.2013-02-12 NJW4108 FEATURE DESCRIPTION (CONTINUED) 7. Reference Voltage Block (VREF pin) This block generates 1.24V and 4.2V reference voltages. The VREF pin outputs 1.24V. In addition to the IC internal reference voltage, this is also used as a reference voltage for charge current setting and temperature detection setting. It is not recommended to connect a capacitor to VREF pin. It will take a long time to start-up of reference voltage when a capacitor is connected to VREF pin. Therefore, it may cause malfunction of logic, charge voltage and charge current circuit. 8. Power Block, Under Voltage Lockout Circuit (UVLO) Block (V+ pin, GND pin) An integrated Under Voltage Lockout circuit prevents IC malfunction when power is turned on or off. This circuit incorporates a 200mV hysteresis width to prevent chattering. As required, insert a bypass capacitor near the IC's V+ pin when there is power line noise or when wires are long. 9. LED Block (LED-R pin, LED-G pin) The 2 LEDs can indicate charge status. (Figure 5) The LED drive circuit is an open collector output configuration. Therefore, it is easy to set a constant LED drive current with resistance values. The expression for setting the current that flows through the LEDs is shown below. ILED-G (Vcc - VF-LED - VOL-G) / RLED or ILED-R (Vcc - VF-LED - VOL-R) / RLED Input ILED RLED VF-LED LED-G LED-R Figure 5. LED Drive Circuit Ver.2013-02-12 - 13 - NJW4108 FLOW CHART Start Check Adapter Voltage V+>2.4V NO Abnormal Charging Prohibited LED-G: OFF LED-R: OFF YES Check Battery Connection CHG-SW Pin=GND NO Adaptor voltage, Battery connection, and Battery voltage are monitored during charging. YES Check Battery Connection VTDET<1.15V NO YES Abnormal Charging Prohibited LED-G: Slow Blinking LED-R: OFF NO Check Battery Temp. VTL<VTDET<VTH YES Battery Temp is monitored during charging. NO Check Battery Voltage VBAT<VOV YES NO Check Voltage VBAT>VQ-CHG YES Quick Charge Timer Start Pre-Charge Timer Start LED-G: OFF LED-R: ON 2mA Charge: ON Quick Charge Start LED-G: OFF LED-R: ON YES YES Time Out Time Out NO NO NO Check Battery Voltage VBAT>VLV Check Full Charge IBAT<IF-CHG NO YES YES Pre-Charge Start 2mACharge: OFF Charge Complete LED-G: ON LED-R: OFF YES Time Out NO Check Battery Voltage VBAT<VR-CHG YES NO Abnormal Charging Prohibited LED-G: OFF LED-R: Blinking Battery Battery Voltage VBAT>VQ-CHG NO YES When charging is prohibited, one of the following action resumes the charging; Unplug and plug power supply Remove and set batteries Charge-SW ON/OFF - 14 - Ver.2013-02-12 NJW4108 TIMING CHART Charge Control Voltage Re-Charge Detecting Voltage Battery Voltage Quick Charge Detecting Voltage 0V PreCharge Quick Charge Constant Voltage Charge ReCharge Full Charge Quick Charge Current Charging Current Pre-Charge Current Full Charge Current CHG-SW OFF ON LED-R OFF ON OFF ON OFF ON OFF LED-G The timing chart at the time of protection circuit operation In addition to a charge timing chart, a protection circuit with a built-in IC operates according to the state and circumference environment of a battery. The timing chart when various protection circuits operate is as follows. Pre-charge time out Quick charge time out Charge Voltage Quick charge detecting voltage Battery Voltage Battery Voltage 0V 0V Pre-charge 22min* Quick charge 3h* Charge Current Charge Current Full charge detection Inactive Active Inactive CNT CNT Inactive Active CHG-SW OFF ON CHG-SW OFF ON LED-R OFF ON LED-R OFF ON ON/OFF 1.28s* LED-G *C1=0.01F Ver.2013-02-12 ON/OFF LED-G OFF Inactive OFF *C2=0.01F - 15 - NJW4108 Low voltage battery (Return) Low voltage battery (Abnormalities) Battery Voltage Battery Voltage Low voltage detecting voltage 0V Low voltage detecting voltage 0V Pre-charge Charge Current 2mA Charge Current 2mA 2mA charge 10s* Inactive 2mA charge 10s* Active CNT Charge STOP Inactive CNT CHG-SW OFF ON CHG-SW OFF ON LED-R OFF ON LED-R OFF ON ON/OFF 1.28s* OFF LED-G LED-G OFF *C1=0.01F *C1=0.01F Over charge battery Battery Voltage Abnormalities in temperature Over charge detecting Battery Voltage 0V 0V Charge Current Charge Current Charge STOP Charge STOP Inactive Inactive CNT CNT CHG-SW OFF LED-R OFF ON CHG-SW OFF LED-R ON OFF ON/OFF 1.28s* LED-G OFF LED-G *C1=0.01F - 16 - OFF ON/OFF 2.56s* Temperature Detecting ON Ver.2013-02-12 NJW4108 OPERATION MATRIX Parameter Battery Un-connecting Quick Charge PreCharge 2mA Charge Full Charge OFF OFF OFF OFF ON OFF OFF ON ON ON ON ON OFF - Q-CHG P-CHG - - - LED-G LED-R Tr. Charge Current Return Charge Timer Temperature Detecting Over Voltage Detecting CHG-SW Battery Setting Full Charge Detecting Abnormal Temperature Over Voltage Error Time OUT OFF OFF OFF OFF Slow Blinking OFF OFF Blinking OFF Blinking OFF 2mA - - - - - Re-Charge Auto Latch Latch Stop Operate Operate Operate Stop Stop Stop - Disregard Operate Operate Operate Operate - Operate Operate Disregard Operate Operate Operate Operate Operate - Operate Stay Operate Operate Operate Operate Re-start Re-start Re-start Stay Operate Operate Operate Operate Re-start Re-start Re-start Disregard - Disregard Disregard Operate Stop Disregard Disregard Disregard: Detection function is not reflected in control although it is operating. LED ON/OFF PATTERN Parameter Adaptor Voltage Detecting Charging Full Charging Temperature Error Over Voltage Detecting Time Out Ver.2013-02-12 NJW4100 LED-R LED-G NJW4108 LED-R LED-G OFF OFF OFF OFF ON OFF OFF ON ON OFF OFF ON OFF OFF OFF SLOW BLINKING BLINKING OFF OFF BLINKING OFF OFF BLINKING BLINKING - 17 - NJW4108 The example of application Specification Input Voltage Charge Control Voltage Pre-Charge Current Quick Charge Current Full Charge Current :more than 5V :4.2V :100mA :750mA :60mA Charge Battery Quick Charge Start Voltage Re-Charge Detection Voltage Over Voltage Detection Voltage :Lithium-ion Battery 1cell :3.07V :3.99V :4.305V Charge Temperature Range : 0C~45C (thermistor :10k, B value 3435) The example of application circuit VIN CIN 47F Q1 RCS 0.2 1/2W SBD COUT Option BATT+ REB 10k GND RBC 390 CNF 1,000pF BATTVREF VREF IC NJW4108 RP1 110k 1 P-CHG RP2 7.5k VREF RR 2.2k RG 910 RF1 110k Q-CHG 20 2 NFB CS1 19 3 CNT CS2 18 4 GND VS 17 VREF 16 5 NC RF2 9.1k LED1 Red LED2 Green RQ1 130k 6 F-CHG V+ 15 7 LED-G TDET 14 8 LED-R TH 13 9 C1 TL 12 10 C2 CHG-SW 11 SW RQ2 120k RB1 0 (Short) RB2 Open VIN C 0.1F VREF RTHL 22k RTDET 15k TDET RTH 24k RTL 15k C2 C1 0.01F 0.01F Q1 SBD RCS CIN - 18 - : 2SA1244 : EC30LA02 : RL1632R-R200-F : MVS16VC47MF46 (Toshiba) (Nihon Inter) (Susumu) (Nippon chemi-con) Ver.2013-02-12 NJW4108 MEMO [CAUTION] The specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Ver.2013-02-12 - 19 -