HV9221 Advance Information High Frequency Multi-Function Current Mode PWM Controller Ordering Information Device 28-pin DIP HV9221 HV9221P Package Options SOW-28 HV9221WG Die HV9221X Features General Description Current-mode control 15 to 450 volt input range internal start-up circuit 50A standby supply current 2mA operating supply current Under-voltage lockout Internal soft start 1% tolerance band gap voltage reference 1.5 MHz low offset error amplifier 1 MHz oscillator The Supertex HV9221 is a dual high-speed Current Mode Switching Power Supply controller that can start and run directly from almost any DC input from 15 volts DC to rectified and filtered 240 volt AC line. This unique input circuit allows the HV9221 to selfstart directly from a high voltage input, and subsequently take the power from an auxiliary converter output which it is controlling, thus allowing very efficient operation while maintaining input-tooutput galvanic isolation limited only by the insulation system of the associated magnetic assembly. When powered by the auxiliary converter outputs or with both outputs disabled (oscillator shuts down) the input current on the +VIN pin is reduced to a maximum of 50A which is beneficial especially in telecommunication applications. High current output drivers (1.5A peak, 0.5A continuous) Driver outputs have low output impedance with VCC = 0V Current sense leading edge threshold switching Fast (25 nsec) over current shutdown Buffered slope compensation ramp generators Fault tolerant single pin synchronization of multiple converters All pins are ESD protected Absolute Maximum Ratings* +VIN, Input Voltage -0.5V to +450V VCC, Supply Voltage -0.5V to +15.5V Operating Temperature Range -40C to +85C Operating Modes Storage Temperature Range 1. Single push-pull converter. Power Dissipation @ 25C 2. Dual 49% duty cycle controller with 180 phasing. -65C to +150C SOW-28 1.0W 28-pin DIP 1.2W Note: *All voltages are referenced to GND. 3. Dual 99% duty cycle controller with 180 phasing. 11/12/01 Supertex Inc. does not recommend the use of its products in life support applications and will not knowingly sell its products for use in such applications unless it receives an adequate "products liability indemnification insurance agreement." Supertex does not assume responsibility for use of devices described and limits its liability to the replacement of devices determined to be defective due to workmanship. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications are subject to change without notice. For the latest product specifications, refer to the Supertex website: http://www.supertex.com. For complete liability information on all Supertex products, refer to the most current databook or to the Legal/Disclaimer page on the Supertex website. 1 HV9221 Electrical Characteristics (Unless otherwise specified, -VIN = 0V, VCC = 10V; -40C TA +85C) Symbol Parameters Min Typ Max Unit Conditions 450 V 50 A +VIN = 450V, VCC = VREG, Enable A & B = 0 mA +VIN = 15V, VCC = Vuvlo, Enable A & B = 0 Pre-regulator/Start-up +VIN Input voltage 15 +IIN Input leakage current ISTART Pre-regulator start-up current 40 VPR VCC pre-regulator voltage 7.8 8.0 8.2 V VDELTA VPR - Vuvlo (turn-on) 0.1 0.2 0.3 V VHYST Under voltage lockout hysteresis 0.9 1.0 1.1 V Over voltage lockout 14.5 15.0 15.5 V Over voltage lockout hysteresis 2.5 3.0 3.5 V 2 mA 2.50 2.52 V Load regulation 1 5 mV 0 mA < IREF < 3mA Line regulation 2 mV UVLO stop threshold +0.5V < VCC < 13V 20 +VIN = 15 to 450V Supply ICC Supply current CLOAD = 50pF, fOSC = 500KHz Reference VR VR Reference output voltage Reference output voltage 2.48 2.45 2.50 Output noise voltage Long term stability Short circuit current 2.55 V Full temp. range, 0mA < IREF < 3mA 200 V 10Hz < f < 10KHz, TJ = 25C mV TA = 125C, 1000 hrs. 3 -6 -10 mA IFB or INI Input bias current 25 200 nA VOS Input offset voltage 5 25 mV VCM Common mode input range 0 VCC V AVOL Open loop voltage gain 60 80 dB BW Unity gain bandwidth 1.5 2.5 MHz IOUT Output current sourcing IOUT Output current sinking 2 PSRR Power supply rejection 50 ISREF -4 TA = 25C Error Amplifiers -2 -1 VFB = 3.0V, VNI = 2.5V mA VFB < VNI 4 mA VFB > VNI 90 dB 8.5V < VCC < 14.5 MOSFET Driver Outputs VOL VOH Output low level Output high level (VCC - VOUT) ISOURCE Peak output current sourcing ISINK Peak output current sinking 1300 0.10 0.15 V IOUT = 20mA 0.3 0.6 V IOUT = 500mA 0.5 0.7 V IOUT = 20mA, VCC = 0V 0.12 0.2 V IOUT = -20mA 0.4 0.7 V IOUT = -500mA -1500 -1300 mA VOUT = 0V mA VOUT = VCC 1500 Output rise time 20 30 ns CLOAD = 2nF Output fall time 20 30 ns CLOAD = 2nF 2 HV9221 Electrical Characteristics (continued) (Unless otherwise specified, -VIN = 0V, VCC = 10V; -40C TA +85C) Symbol Parameters Min Typ Max Unit Conditions 900 1000 1100 KHz RT = TBD, RD = 0 450 500 550 KHz RT = TBD, RD = 0 90 100 110 KHz RT = TBD, RD = 0 100 300 ppm/C 1 2 % 5.0 5.5 V 10 A 0.5 V Oscillator fOSC Initial accuracy Temperature coefficient Voltage stability VSYNC(out)high Sync output voltage - high ICYNC(out)high Sync output current - high VSYNC(out)low Sync output voltage - low ISYNC(out)low Sync output current - low VSYNC(in) Maximum Sync input voltage VSYNC(in) Sync threshold - low ISYNC(in) Sync input current - low 4.5 0.3 0.5 0.8 -1.0 fOSC = 100KHz fOSC=100KHz, 15V >VCC > 8V mA 5.5 V 1.7 2.0 V -20 -30 A 1.0 V Current Sensing VCSA & VCSB Usable control current sense range 0.5 VCSA & VSCB Current limit threshold 1.1 1.2 1.3 V VCSA & VCSB Leading edge current limit threshold 1.1 1.3 1.5 V Leading edge threshold time 45 50 55 nsec 30 50 nsec Current limit delay to output Slope Compensation Ramp Generators VCSA or VCSB Peak voltage 0.9 1 1.1 V 49% duty cycle or push-pull mode VSCA or VSCB Peak voltage 1.8 2.0 2.2 V 99% duty cycle mode VSCA or VSCB Valley voltage 0 0.01 0.02 V 5 VCC V Output impedance Logic Controls Inputs (ENABLE-A, ENABLE-B, PP, 49%/99%) VENABLE Maximum input voltage VENABLE Open terminal voltage VENABLE(high) Pull high threshold voltage IENABLE(high) Pull high input current VENABLE(low) Pull low threshold voltage IENABLE(low) Pull low input current 0.5VCC -1.8 -2.0 V -2.2 A 100 1.8 2.0 V 2.2 V A -100 Over Temperature Shutdown Shutdown junction temperature 110 125 140 C Hysteresis (temperature drop) 40 50 60 C 3 Referenced to VCC HV9221 Block Diagram NIA FBA COMPA CSA ENABLE-A TN-Level Enable Detection and Latch - + 5mSec Soft-Start VCC REF Internal Reference Generators 8.0V Thermal Shutdown 0.2V - and Latch Circuit UVLO + + - - +VIN + OVLO 50nSec One-Shot - + +15.0V Over Current Comparator A 1.2V + GND - - R + Substrate S Q OUT-A PWRGND OUT-B S Q + R - - Tri-Level 1K Enable Detection 10 and Latch + - NIB FBB COMPB CSB ENABLE-B PP PP 50-Sec One-Shot 5mSec Soft-Start A B 1.2V + Over Current Comparator B ENA ENB SCA Oscillator SCB MODE 4 SYNC RD RT HV9221 Pin Descriptions GND - Ground connection for all low level analog and digital circuits. SYNC - This bidirectional Input/Output negative transition active pin provides a means for synchronizing several PWM chips or synchronizing against an application system master oscillator. PWRGND - This pin provides ground return for the high transient currents of the output driver circuits. SCA, SCB - These low impedance output buffered ramp generators provide positive going ramp outputs corresponding to the mode of operation of this PWM circuit and is intended to enable the user to provide optimal slope compensation to the feedback circuits. +VIN - This is the start-up pre-regulator input which can accept input voltages in the range of 15 to 450 volts DC. VCC - This is the supply pin to the PWM circuit. During start-up this pin is powered by the start-up linear pre-regulator which regulates to a nominal voltage of 8 volts over the full input voltage range of the +VIN pin. CSA, CSB - These are the current sense inputs to the PWM comparators. OUT-A, OUT-B - These high current push-pull outputs of the PWM are designed to drive the gates of power MOSFETs. COMPA, COMPB - The low impedance output of the error amplifiers. REF - This pin provides a 1% accuracy 2.5 volts buffered, low output impedance reference. FBA, FBB - The high impedance inverting input of the error amplifiers. ENABLE-A, ENABLE B - These input pins provide means for shutting down the PWM. NIA, NIB - The high impedance non-inverting input of the error amplifiers. MODE - This input is used to select the operating mode of this PWM. The mode selections are as follows: RT - The oscillator charging current is set by the value of the resistor connected from RT to GND. Pin Connection Operating Mode GND OPEN VCC 49% Dual PWM 99% Dual PWM 49% Single Push-Pull PWM RD - External resistor to GND to control the discharge rate of the internal timing capacitor. 11/12/01 (c)2001 Supertex Inc. All rights reserved. Unauthorized use or reproduction prohibited. 5 1235 Bordeaux Drive, Sunnyvale, CA 94089 TEL: (408) 744-0100 * FAX: (408) 222-4895 www.supertex.com