AN33013UA Evaluation Board Manual Panasonic Corporation Automotive & Industrial Systems Company Semiconductor Business Division 1 AN33013UA Evaluation board (front side) SYNC input terminal (external clock input) VCC GND RT resistor. To set the switching frequency to 490KHz, connect the jumper switches like below. (RT2=130K) SMA_SYNC (BNC terminal for external clock) (Default settings) To set the switching frequency to 205KHz , connect the jumper switches like below. (RT1=330K) DCDC output pin (sense pin / force pin) Output voltage setting: 5.0V To set the switching frequency to 2067KHz , connect the jumper switches like below. (RT1=22K) SW2 TL_CTRL control switch JP2 If you connect this jumper switch, the FLAG pin will be connected to VREG(4.9V) via a 200kregister. SW1 Enable control switch Upper side (high): DCDC ON Lower side (low): DCDC OFF 2 AN33013UA Evaluation board (back side) This is a two layer circuit board. The back side is shown below. (The front side is shown on the previous page.) The RC constant for phase compensation is set for output voltage 5.0V. 3 AN33013UA Evaluation board (schematic) The block diagram of the board is shown below. CVREG VREG 9 EN 16 N.C. N.C. 2 8 UVLO TSD 18 FLAG 19 RFLAG OVP (VCC) VINT VREG Pull-up TL_CTRL BTVCC 21 VCC 7 RS CVCC1~3 RRS 4 OVP 20 PVCC2 CNT 22 SCP BT PVCC SYNC CBT 17 OSC Ext.CLK RT ERAMP PLL 14 PWM 15 CT CCT 1 LX1 24 LX2 L1 5.0 V PRIDRV D1 3 JP1 NMOS 5 OCP CTL 1 VCC_S 3 PVCC1 SST 2 6 VREF (BGR) Timer Latch TL Vcc 13 SS CSS 12 FB 11 COMP 10 SGND COUT1 23 PGND CC1_1 RC1_1 CC1_2 CC1_3 RT1 RT3 RC1_2 RT2 RC1_3+RC1_4 RC1_5+RC1_6 Constant for phase compensation + Constant for setting output voltage 4 AN33013UA Evaluation board (components) The BOM of this board is shown below. Table 1 : component on the evaluation board (reference) Board Component Name Part Name Size Value Maker Description CBT,CCT,CSS,CTL GCM188R11C104KA01J JIS1608_[EIA0603] 0.1F Murata Setting Capacitor CC1_1 GCM1882C1H222JA01J JIS1608_[EIA0603] 2.2nF Murata Compensation Capacitor CC1_2 GCM1882C1H240JA01J JIS1608_[EIA0603] 24pF Murata Compensation Capacitor CC1_3 GCM1882C1H471JA01J JIS1608_[EIA0603] 470pF Murata Compensation Capacitor CVREG GCM188R71C105KA49J JIS1608_[EIA0603] 1F Murata VREG Capacitor CVCC1,CVCC2, CVCC3 CKG57NX7R1H226MT JIS5750[EIA2220] 22F TDK COUT1 TMK325C7226MM-T JIS3225_[EIA1210] 22F TAIYO YUDEN Output Capacitor L1 CDRH8D43-100NC 8.3(L) x 8.3(W) 10H SUMIDA Inductor LSI1 AN33013UA -- Panasonic 1ch DC-DC Converter D1 DB24416 3.8(L) x 2.4(W) -- Panasonic Schottky Diode RC1_1 ERA3AEB752V JIS1608_[EIA0603] R=7.5K Panasonic Compensation & Feedback Resistor RC1_2 ERA3AEB152V JIS1608_[EIA0603] R=1.5K Panasonic Compensation & Feedback Resistor RC1_3 ERJ3GEY0R00V JIS1608_[EIA0603] R=0 Panasonic Compensation & Feedback Resistor RC1_4 ERA3AEB303V JIS1608_[EIA0603] R=30K Panasonic Compensation & Feedback Resistor RC1_5 ERJ3GEY0R00V JIS1608_[EIA0603] R=0 Panasonic Compensation & Feedback Resistor RC1_6 ERA3AEB752V JIS1608_[EIA0603] R=7.5K Panasonic Compensation & Feedback Resistor RFLAG ERA3AEB204V JIS1608_[EIA0603] R=200K Panasonic Pull-up Resistor RT1 ERA3AEB134V JIS1608_[EIA0603] R=130K Panasonic OSC Setting Resistor RRS ERJ8BWFR030V JIS3216_[EIA1206] R=30m Panasonic OCP Sense Resistor Input Capacitor Note: The specifications of the BOM are reference values. 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