[AP3603] AP3603 High Power Dual Output Step-Up DC-DC Controller 1. General Description The AP3603 is a dual output step-up DC-DC controller. The output voltage can be set up to 60V by an external feedback resistor. A wide input range of 6.4V to 20V is available, which is possible to realize a high power boost source from the battery or the other power sources. The AP3603 supports either 200W×2ch dual outputs or 400W×1ch dual phase single output. PWM switching frequency is set from 40kHz to 500kHz by an external resistor. As the protective functions, it has output over voltage protection and over current protection. The AP3603 is housed in a space-saving 20-pin HTSSOP package. 2. Features Input Voltage Range 6.4 to 20V Oscillation Frequency Setting Range 40k to 500kHz（Set by external resistor） 8V Gate Driver for External N-channel MOSFET（ON resistance : 3Ω) Over Temperature Protection Output Over Voltage Protection Quasi-Foldback Over Current Protection Accuracy of Feedback Voltage +3% /-2 % (Tj=-40～145℃) Dual Output or Dual Phase Single Output Application is Selectable Package 20-pin HTSSOP 1 1 2 3 4 5 3 4 5 6 Vin Vin R1 A 2 6 R1 A C1 A A C1 L1 L1 R7 R9 R8 B C8 C7 C9 C R10 R11 PWON FSYN RSP1 RT RSN1 FB1 DRV1 CC1 GND2 GND1 VDD SS V8 CC2 V4 R7 D1 R3 M1 C2 C8 B C7 M2 C6 DRV2 PWON RSN2 MDC RSP2 C CH-2 VoutC R5 L2 Size Date: File: 3 R10 R11 C3 RSN1 FB1 DRV1 CC1 GND2 GND1 VDD Number R2 C5 V4 FB2 DRV2 PWON RSN2 MDC RSP2 M2 C6 5 L2 Title R2 Number Revision A4 Date: File: 1 2 3 D 2014/09/12 C:\Users\..\AP3603_140912.SchDoc 4 Sheet of Drawn By : 5 6 Dual Phase Application Output Voltage Power Amplifier 12V 20V Booster 200W class 6.4V 12V Booster 400W class 6.4V 12V Output Current CH-1 7.5A CH-2 7.5A CH-1 17A CH-2 17A 34A 015000004-E-02 Output Power CH-1 150W CH-2 150W CH-1 204W CH-2 204W 400W Circuit Dual Output Dual Output Dual Phase Single Output 2015/07 -1- B D2 6 Input Voltage C2 C PWON D Sheet of Drawn By : R3 C4 V8 CC2 D 4 Vout Size Revision 2014/09/12 C:\Users\..\AP3603do_140912.SchDoc D1 M1 R4 R12 Dual Output Application Applications RSP1 RT R6 A4 D FSYN SS C9 D2 Title 2 B R4 FB2 R8 C4 C5 R12 1 R9 CH-1 Vout [AP3603] 3. Table of Contents 1. 2. 3. 4. 5. 6. General Description ........................................................................................................................................... 1 Features .............................................................................................................................................................. 1 Table of Contents............................................................................................................................................... 2 Block Diagram................................................................................................................................................... 3 Ordering Guide .................................................................................................................................................. 3 Pin Configurations and Functions...................................................................................................................... 4 ■ Pin Configurations ....................................................................................................................................... 4 ■ Functions ..................................................................................................................................................... 5 7. Absolute Maximum Ratings .............................................................................................................................. 6 8. Recommended Operating Conditions ................................................................................................................ 6 9. Electrical Characteristics ................................................................................................................................... 7 10. Functional Descriptions ..................................................................................................................................... 8 10.1 Basic Operation ..................................................................................................................................... 8 10.2 Shut Down ............................................................................................................................................. 8 10.3 Power On Sequence ............................................................................................................................... 8 10.4 Soft Start ................................................................................................................................................ 8 10.5 Power Down Sequence .......................................................................................................................... 8 10.6 Over Voltage Protection ........................................................................................................................ 8 10.7 Quasi-Foldback Over Current Protection (PWM operation) ................................................................. 8 10.8 CC1 and CC2 Pin Voltage (Error Amplifier output) Clamping Function ............................................. 9 10.9 External Synchronous Operation ........................................................................................................... 9 11. Timing Chart.................................................................................................................................................... 10 12. Application Information .................................................................................................................................. 11 12.1 Output Voltage Setting ........................................................................................................................ 11 12.2 Operational Frequency Setting ............................................................................................................ 11 12.3 Maximum ON Duty Setting ................................................................................................................. 11 12.4 Maximum Output Voltage ................................................................................................................... 11 13. Attention of PCB Layout ................................................................................................................................. 12 ■ Recommended Layout ............................................................................................................................... 12 ■ GND Layout .............................................................................................................................................. 12 ■ Switching Node Layout ............................................................................................................................. 12 ■ Current Sense Resistor Layout .................................................................................................................. 12 ■ Feedback Pin Layout ................................................................................................................................. 12 ■ Capacitors for V8, V4 and SS.................................................................................................................... 12 ■ Bypass Capacitor ....................................................................................................................................... 12 14. Typical Characteristics .................................................................................................................................... 13 15. Recommended External circuits ...................................................................................................................... 14 ■ Recommended External Circuit of Dual Output .................................................................................. 14 ■ Parts List .............................................................................................................................................. 14 ■ Recommended External Circuit of Dual Phase Single Output ............................................................ 15 ■ Parts List .............................................................................................................................................. 15 16. Package ............................................................................................................................................................ 16 ■ Outline Dimensions ................................................................................................................................... 16 ■ Marking ..................................................................................................................................................... 16 17. Revise History ................................................................................................................................................. 17 Add 10.7 Quasi-Foldback Over Current Protection (PWM operation) ........................................................... 17 IMPORTANT NOTICE .......................................................................................................................................... 18 015000004-E-02 2015/07 -2- [AP3603] 4. Block Diagram Iss V5 SS SS VDD Vref V 5R eg . RSP1 UVLOcomp GND1 V5 UVLOcomp + Vref V ref PWON + Vref - PWON VO OVPcomp Reset Level Shift1 Vcnt. 3.6V FB1 + FBamp1 iRAMP Reset - MDC Vref Max Duty Control + Reset - RSP2 UVLOcomp + Control Logic Set OCLcomp1 Vref FSYN V8 V 8R eg . + Level Shift2 - CSamp2 + Vcnt. 3.6V FB2 + FBamp2 VDD iRAMP V4 Vref V8 SS + RSN2 RT OSC V8 UVLOcomp - RSP2 Vref - - CC2 + Reset PWMcomp1 + CC1 FB VDD OVPcomp SS + RSN1 Vrefx1.35 - VDD CSamp1 RSP1 + PWMcomp2 Reset - DRV1 Vref - OCLcomp2 + Reset - DRV2 GND2 5. Ordering Guide AP3603 -40～125°C 20-pin HTSSOP 015000004-E-02 2015/07 -3- [AP3603] 6. Pin Configurations and Functions ■ Pin Configurations FSYN 1 20 RSP1 RT 2 19 RSN1 FB1 3 18 DRV1 CC1 4 17 GND2 GND1 5 16 VDD SS 6 15 V8 CC2 7 14 V4 FB2 8 13 DRV2 PWON 9 12 RSN2 11 RSP2 MDC (Top View) Exposed Pad 10 015000004-E-02 2015/07 -4- [AP3603] ■ Functions No. Pin Name I/O 1 FSYN I 2 RT I 3 FB1 I 4 CC1 O 5 GND1 - 6 SS O 7 CC2 O 8 FB2 I 9 PWON I 10 MDC O 11 12 13 RSP2 RSN2 DRV2 I I O 14 V4 O 15 V8 O 16 VDD - 17 GND2 - 18 19 20 DRV1 RSN1 RSP1 O I I Function External Synchronous Pin This pin switches boost N-channel MOSFET of CH1 ON, synchronizing the falling edge of input clock. The pin is pulled-up by 10uA constant current internally. PWM Frequency Setting Pin Connect the resistor to GND1 for setting the PWM frequency. Refer 12.2 Operational Frequency Setting to calculate the resistance. CH1 Output Voltage Feedback Pin Output voltage is controlled so that FB1 pin voltage becomes 3.6V. Connect the feedback resistance between the positive side of output capacitor and GND1, and voltage divide node of feedback resistance should be connected to FB1 pin. CH1 Error Amplifier Output Pin Connect the resistance and capacitor in parallel between CC1 pin and SS pin to compensate phase stability. Signal Ground Pin Connect GND2 at just below the AP3603 to prevent potential difference between this pin and the GND2 pin. CH1 and CH2 Soft Start Pin Connect a capacitor between SS pin and GND to set the soft start time. When the capacitor value is 0.1uF, the soft start time becomes 12ms. CH2 Error Amplifier Output Pin Connect the resistance and capacitor in parallel between CC2 pin and SS pin to compensate phase stability. CH2 Output Voltage Feedback Pin Connect the feedback resistance between the positive side of output capacitor and GND1 during dual output application usage. Voltage divide node of feedback resistance should be connected to FB2 pin. Connect this pin to FB1 pin at the dual phase single output application usage. Power On Signal Input Pin After “H” signal input, the internal voltage source V5 is powered up and then the start-up sequence is initiated. Maximum On Duty Set Pin Set the maximum on time by the external resistance connecting between MDC and GND1. CH2 Current Detect Positive Pin CH2 Current Detect Negative Pin CH2 N-channel MOSFET Drive Pin V4 Linear Regulator Output Pin Middle voltage node of boost driver. Connect MLCC 0.22μF or more between V4 pin and GND2 to stabilize the internal voltage. V8 Linear Regulator Output Pin Power source of Boost driver. Connect MLCC 2.2μF or more between V8 and GND2 to stabilize the internal voltage. Main Power Source Pin Power Ground Pin Connect the GND1 at just below the AP3603 to prevent potential difference between this pin and the GND1 pin. CH1 N-channel MOSFET Drive Pin CH1 Current Detect Negative Pin CH1 Current Detect Positive Pin 015000004-E-02 2015/07 -5- [AP3603] 7. Absolute Maximum Ratings Parameter Symbol min -0.3 Voltage between VDD, RSP1, RSP2, RSN1, RSN2 and GND Voltage between CC1, CC2, MDC, SS, FB1, FB2, RT, FSYN, -0.3 PWON, V4 and GND -0.3 Voltage between V8, DRV1, DRV2 and GND -0.3 Voltage between V8 and V4 -0.3 Voltage between RSP1and RSN1, RSP2 and RSN2 Tstg -40 Storage Ambient Temperature Range Tj -40 Junction Temperature PD Power Dissipation (Ta=25°C) Note 1. GND=GND1=GND2 Note 2. Connect GND1 and GND2 at just below the AP3603 on PCB. Note 3. Junction to Ambient Thermal Resistance θJA= 40°C /W Ambient temperature of 25ºC using JEDEC 4L board. (114.3mm×76.2mm) max 40 Unit V 6 V 12 6 6 150 145 3000 V V V °C °C mW WARNING: Operation at or beyond these limits may result in permanent damage to the device. Normal operation is not guaranteed at these extremes. 3500 POWER DISSIPATON [mW] 3000 2500 2000 1500 1000 125℃ 500mW 500 0 -55 -30 -5 20 45 70 95 120 145 OPERATING AMBIENT TEMPERATURE Ta ℃ [ ] Figure 1. Power Dissipation 8. Recommended Operating Conditions Parameter Symbol min typ max Unit Operating input voltage range Vin 6.4 20 V Operating ambient temperature Ta -40 125 °C WARNING: AKM assumes no responsibility for the usage beyond the conditions in this data sheet. 015000004-E-02 2015/07 -6- [AP3603] 9. Electrical Characteristics （VVDD=12V，Tj=-40～145°C unless otherwise specified.） Parameter Symbol min typ max Unit Output Voltage Range 8V Driver Power Source 4V Drive Power Source Feedback Voltage Vout V8 V4 VrefFB 7.6 3.7 3.51 8.0 4.0 3.58 60 8.3 4.2 3.69 V V V V Shutdown Current 1 ISDN1 - - 10 uA Shutdown Current 2 ISDN2 - - 2 uA Static Circuit Current1 ISUPPLY1 - - 3.5 uA Static Circuit Current2 ISUPPLY2 - - 250 uA Power-ON Voltage Power-OFF Voltage Power-ON Pin Current “H” Power-ON Pin Current “L” V8 Output Under Voltage Protection（UVP） V8 UVP Hysteresis RSP Input Under Voltage Protection（UVP） RSP Input Under Voltage Protection Release Soft Start Pin Charge Current Soft Start Time VPWON VPWOFF IPWONON IPWONOFF 2.4 - 15 - 0.6 1.5 V V uA uA V8UVP 5.0 5.28 5.6 V V8UVLOhys 0.2 0.28 0.4 V RSPUVP 3.5 3.75 4.2 V 4.2 4.5 4.8 V ISSON TSS 8.5 - 10 12 11.5 - uA ms Over Current Detect Voltage VOCL 80 100 120 mV OVP 130 139 150 ％ VDDOVP 21.5 - - V Fclk -14 0 14 ％ 40k～500kHz setting Dual Phase 80k～1000kHz Fsync 80 - 120 ％ Fclk(typ)Ratio. Vsync 0.6 - 2.4 V External N-channel MOSFET Switching Time (Note 4) Trise 80 100 150 ns Tfall 20 55 150 ns Minimum On Time Minimum Off Time Thermal Protection Operating Temperature (Note 4,Note 5) Thermal Protection Hysteresis (Note 4,Note 5) MINON MINOFF - 200 250 - ns ns TSD - 175 - °C TSDhys - 15 - °C Output Over Voltage Protection VDD Over Voltage Protection Oscillation Frequency External Synchronous Clock Input Range External Synchronous Clock Input threshold RSPUVLO Condition VDD supply, VDD=10～20V, PWON=0V RSP1/2supply, RSP1/2 =10～ 36V, PWON=0V VDD supply RSP1/2 supply, RSP1/2 =10～ 36V VPWON=5V(Input Current) VPWON=0V(Output Current) DIS Css=0.1uF Voltage between RSP and RSN Ratio to Reference Voltage of Feedback CL=10nF 10%to90% VVDD=13V f=250kHz CL=10nF 90%to10% VVDD=13V f=250kHz RMDC＞127kΩ Note 4. Guaranteed by design. Note 5. This function protects the AP3603 against an overheat situation. However, it does not guarantee the operation under the condition that the overheat situation beyond the specifications continues. 015000004-E-02 2015/07 -7- [AP3603] 10. Functional Descriptions 10.1 Basic Operation The AP3603 operates in current mode PWM controlling. The feedback voltage (FB1 pin and FB2 pin) is compared to an internal reference voltage by an error amplifier. Then the output of an error amplifier (CC1 pin and CC2 pin) is converted into a current reference which compares to the inductance current. The ON time of an external N-channel MOSFET continues until the inductor current reaches to the current reference. The inductor current is detected by the current sensing resistor (R1 and R2) which is connected between RSP and RSN. When the current reaches the target, the external N-channel MOSFET turns off and the AP3603 continues these cycles for the asynchronous PWM operation. 10.2 Shut Down Even if the main power supply (VVDD) is supplied, the AP3603 is in shutdown status if the PWON pin is “L”. Under this condition, the shutdown current is maximum 10uA. 10.3 Power On Sequence When PWON pin becomes “H” from “L”, V5 and UVLO circuits start up. After V5 starts up, the voltage reference and the over temperature protection circuits start. The AP3603 starts up protective circuit, V4 circuit and V8 circuits if it judges it is not under the over temperature condition. After V8 circuit has settled to 8V, internal oscillation and soft start sequence start. Starting time of V8 is estimated as 4ms(typ) under the typical application condition using recommended components. 10.4 Soft Start This function raise the output voltage gradually by limiting current and voltage, to prevent an over shoot when the output voltage is powered up. When a reset signal from the internal power supply circuit is released, the AP3603 start charging to an external capacitor connected to SS pin by a constant current and soft start operation is finished when the reference voltage reaches 1.2V. During this time, the current limit value and the over voltage detection value is changed in proportion to the external capacitor voltage. The start-up time of the output voltage depends on the output capacitor values and load conditions. These values are calculated by following equation. ・Over current protection： 100mV(typ)×SS pin voltage /1.2V (Voltage between RSP pin and RSN pin) ・Over voltage protection： Setting Output voltage×SS pin voltage /1.2V 10.5 Power Down Sequence If PWON pin becomes “L” from “H” during PWM operation, the AP3603 stops switching and shunts SS pin. Only V8 circuit is shut down as internal circuit. 10.6 Over Voltage Protection This function monitors the feedback voltage and turns off an external N-channel MOSFET in case the output voltage beyond +139% from setting voltage. 10.7 Quasi-Foldback Over Current Protection (PWM operation) AP3603 monitors the coil current by the voltage difference between RSP and RSN during on-time of external N-channel MOSFET. When the difference reaches 100mV fixed value, AP3603 turns off the external N-channel MOSFET and prevents coil and MOSFET from destruction. This OCL protection operates every switching cycle and so switching continues. 015000004-E-02 2015/07 -8- [AP3603] 10.8 CC1 and CC2 Pin Voltage (Error Amplifier output) Clamping Function The voltage of CC pin (CC1 and CC2) which is the output of error amplifier stays around 1.2V (SS pin voltage) under the condition of normal PWM operation. The feedback response goes worse in case the voltage difference between CC pin (CC1 and CC2) and 1.2V becomes large under the abnormal condition like the output voltage beyond setting voltage. It causes the over shoot or under shoot. The AP3603 clamps the voltage of CC pin (CC1 and CC2) as below to prevent CC pin (CC1 and CC2) voltage from going out of a normal operating condition Detect condition Release condition Operation CCx pin voltage≦0.9V or FBx pin voltage≦3.6V×75% Switching command has requested or FBx pin voltage≧3.6V×85% CCx pin connects to SS pin and Error Amplifier output disconnect to CCx pin 10.9 External Synchronous Operation External synchronization is available by an input timing signal to the FSYN pin. The AP3603 enters external synchronous operation mode when edge of FSYN turns off the external MOSFET connected to DRV2. If the high level input of FSYN continues more than 1 cycle of internal CLK, the AP3603 change the synchronization from external clock to internal oscillator. The input signal to the FSYN pin for synchronization must be 50% duty. FSYN pin must be open in case of no use of external synchronous operation. The AP3603 does not operate if FSYN pin connect to GND because internal OSC does not generate the clock signal. At the case of using an external synchronous operation, FSYN pin must be open before and during startup. And input the external clock to FSYN pin after V8 voltage reach the target (8V ) approximately. 内部発振 Internal OSC 50% 50% 50% 50% 外部同期 External SYNC 内部発振 Internal OSC 内部CLK Internal CLK FSYN FSYN(外部CLK) (External CLK) Precede internal clock in input High Hi入力時は内部CLK優先 DRV1 DRV1 DRV2 DRV2 固定オフ時間 Fixed OFF time 外部同期可能 Available external Sync 外部同期可能 Available external Sync 外部同期開始 Enter external Sync 外部同期解除 Exit external Sync Figure 2. External Synchronous Timing Chart 015000004-E-02 2015/07 -9- [AP3603] 11. Timing Chart VDD(RSP) PWON TSD V5 V4 4.2 ms 4.2ms V8 12ms SS OCL&OVP制御 OCL&OVP control PWM制御 PWM control 100% OCL Level 0% OVP Level 100% 139% 0% 3.6V FB(VOUT) DRV Figure 3.Timing Chart 015000004-E-02 2015/07 - 10 - [AP3603] 12. Application Information 12.1 Output Voltage Setting Output voltage is settled by feedback resistors that are connected between the output capacitor and the GND. The value of R3, R4 (output capacitor-FB pin) and R5, R6(FB pin-GND1) is calculated by the next equations. CH1 Vout ＝3.6 1 R3 [ V] R4 CH2 Vout ＝3.6 1 R5 [ V] R6 12.2 Operational Frequency Setting Operational frequency is settled by the resistor R7 between the RT pin and the GND. The value of the resistor is calculated by the next equations. R7＝ 0.5 1.2V [Ω] Frequency Hz 3.2pF 1.5V 4 12.3 Maximum ON Duty Setting Maximum On duty is settled by the resistor between MDC pin and GND. The value of the resistor is calculated by the next equations. RMDC [Ω] Duty(typ) [%] 10k 60% 27k 70% 47k 80% 82k 90% 127k or more (Note 6) Note 6. Maximum ON duty is fixed by the operational frequency and minimum off time 250ns (typ). If f>250kHz, duty may be limited by the minimum off time of the IC. Max Duty＝(1 250ns Frequency) 100 [％] 12.4 Maximum Output Voltage The maximum output voltage depends on maximum ON duty. It is estimated by the next equation. Vin Max Vout ＝ [V] 1.1 Duty 015000004-E-02 2015/07 - 11 - [AP3603] 13. Attention of PCB Layout ■ Recommended Layout Figure 4. Top Layer Figure 5. Top Layer Silk Figure 7. Bottom Layer Silk Figure 6. Bottom Layer ■ GND Layout GND plane should be as large as possible. The output capacitor and input capacitor should be connected to the same ground plane. ■ Switching Node Layout The switching node line between external N-channel MOSFETs, the Schottky barrier diode and power inductor should be thick and short. Wiring to the DRV1 and DRV2 should be as short as possible. ■ Current Sense Resistor Layout A current sense resistor should be located as close as possible to the AP3603 so that the wirings to the RSP pin and the RSN pin from the both ends of the current sense resistor have the same resistance. ■ Feedback Pin Layout Feedback resistors connected in series between the output capacitor and the GND should be connected as near as possible to the output capacitor and as far as possible from the switching node. The middle point of feedback two resistors should be as close as possible to the FB pin. ■ Capacitors for V8, V4 and SS Capacitors between V8 pin and GND2, V4 pin and GND2, SS pin and GND1 should be connected as near as possible to the each terminals of the AP3603. ■ Bypass Capacitor The bypass capacitor between the VDD pin and the GND2 should be connected as near as possible to the AP3603. 015000004-E-02 2015/07 - 12 - [AP3603] 14. Typical Characteristics 1.22 100 Vin=6.0[V] Vin=7.0[V] Vin=8.0[V] Vin=9.0[V] Vin=10.0[V] Vin=11.0[V] Vin=12.0[V] 90 80 60 1.207 Vref[V] efficiency[%] 70 1.213 50 1.2 40 1.193 30 20 1.187 10 1.18 -50 0 0 1 2 3 4 5 7 Iout[A] 8 9 10 11 12 0 50 100 150 Ta[℃] Figure 8. Efficiency 12V Output Figure 9. Vref vs. Ta 13.2 Iout= 0.0[A] Iout= 1.0[A] Iout= 2.0[A] Iout= 3.0[A] Iout= 4.0[A] Iout= 5.0[A] Iout= 6.0[A] Iout= 7.0[A] Iout= 8.0[A] Iout= 9.0[A] Iout=10.0[A] Iout=11.0[A] Iout=12.0[A] 13.0 12.8 12.6 Vout[V] 12.4 12.2 12.0 11.8 11.6 11.4 11.2 11.0 10.8 6 7 8 9 Vin[V] 10 11 12 Figure 10. Line Regulation 12V Output 13.2 Vin= 6.0[V] 13 Vin= 7.0[V] 12.8 Vin= 8.0[V] 12.6 Vin= 9.0[V] Vin=10.0[V] 12.4 Vin=11.0[V] Vin=12.0[V] Vout[V] 12.2 12 11.8 11.6 11.4 11.2 11 10.8 0 1 2 3 4 5 6 7 Iout[A] 8 9 10 11 12 Figure 11. Load Regulation 12V Output 015000004-E-02 2015/07 - 13 - [AP3603] 15. Recommended External circuits ■ Recommended External Circuit of Dual Output 1 2 3 4 5 6 Vin R1 A A C1 L1 R7 R9 R8 B C8 C7 C9 C R10 R11 PWON FSYN RSP1 RT RSN1 FB1 DRV1 CC1 GND2 GND1 VDD SS V8 CC2 V4 FB2 DRV2 PWON RSN2 MDC RSP2 D1 CH-1 Vout R3 M1 C2 B C4 R4 C5 M2 C6 D2 CH-2 VoutC R5 L2 Title R12 Size C3 R6 Number R2 Revision A4 D Date: File: 1 2 3 D 2014/09/12 C:\Users\..\AP3603do_140912.SchDoc 4 Sheet of Drawn By : 5 6 Figure 12. Dual Output Step Up Application ■ Parts List Parameter Input capacitor Symbol C1 Output Capacitor C2 Output Capacitor C3 Bypass capacitor Capacitor for V8 Capacitor for V8 Middle point Capacitor for soft start Phase Compensation Capacitor Phase Compensation Capacitor Current Sense Resistor Current Sense Resistor CH1 feedback resistor(H) CH1 feedback resistor(L) CH2 feedback resistor(H) CH2 feedback resistor(L) Frequency setting resistor CH1 phase compensation resistor CH1 phase compensation resistor CH2 phase compensation resistor CH2 phase compensation resistor Catcher diode Power inductor N-channel MOSFET C4 C5 C6 C7 C8 C9 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 R11 D1,D2 L1,L2 M1,M2 (Vin=6.4V～12V、Vout=12V、Io=17A、f=400kHz) Condition 10uF×10parallel 330uF/16V×4parallel 10uF/25V(MLCC)x2parallel 330uF/16V×4parallel 10uF/25V(MLCC)x2parallel 0.1uF 2.2uF 0.22uF 0.1uF 6800pF 6800pF 2mΩ 2mΩ 110kΩ 47kΩ 110kΩ 47kΩ 75kΩ 4.7kΩ 47kΩ 4.7kΩ 47kΩ 40V30A 2.2uH 40V100A 015000004-E-02 2015/07 - 14 - [AP3603] ■ Recommended External Circuit of Dual Phase Single Output 1 2 3 4 5 6 Vin R1 A C1 A L1 R7 R9 R8 B C8 C7 C9 C R10 R11 FSYN RSP1 RT RSN1 FB1 DRV1 CC1 GND2 GND1 VDD SS V8 CC2 V4 FB2 DRV2 PWON RSN2 MDC RSP2 D1 Vout R3 M1 C2 B C4 R4 C5 M2 C6 D2 C PWON L2 Title R12 Size Number R2 Revision A4 D Date: File: 1 2 3 D 2014/09/12 C:\Users\..\AP3603_140912.SchDoc 4 Sheet of Drawn By : 5 6 Figure 13. Dual Phase Step-Up Application ■ Parts List Parameter Input Capacitor Output Capacitor Bypass capacitor Capacitor for V8 Capacitor for V8 Middle point Soft Start Capacitor Capacitor for phase compensation Current Sense Resistor Current Sense Resistor Feedback resistor(H) Feedback resistor(L) Frequency setting resistor Phase Compensation Resistor Phase Compensation Resistor Catcher diode Power inductance N-channel MOSFET (Vin=6.4～12V、Vout=12V、Iout=34A、f=400kHz) Symbol Conditions 10uF×10parallel C1 330uF/16V×4parallel C2 10uF/25V(Ceramic)x2parallel 0.1uF C4 2.2uF C5 0.22uF C6 0.1uF C7 6800pF C8 2mΩ R1 2mΩ R2 110kΩ R3 47kΩ R4 150kΩ R7 4.7kΩ R8 47kΩ R9 40V30A D1,D2 3.3uH L1,L2 40V50A M1,M2 015000004-E-02 2015/07 - 15 - [AP3603] 16. Package ■ Outline Dimensions ・20-pin HTSSOP (Unit : mm) ■ Marking AP3603 XXXXXXX (2) (3) (1) 1pin Indication (2) Product No. (3) Date Code (7digits) (1) 015000004-E-02 2015/07 - 16 - [AP3603] 17. Revise History Date (YY/MM/DD) 15/02/09 15/03/12 15/07/30 Revision Page 00 01 8 02 1 3 9 11 Contents First edition Add 10.7 Quasi-Foldback Over Current Protection (PWM operation) 2.Features; Correction of the explanation of input voltage 5. Ordering Guide; Correction of the explanation of ordering number, Correction of the explanation of 10.9 external synchronous operation 12. Application Information; Correction of the explanation of 12.1 output voltage setting. 015000004-E-02 2015/07 - 17 - [AP3603] IMPORTANT NOTICE 0. Asahi Kasei Microdevices Corporation (“AKM”) reserves the right to make changes to the information contained in this document without notice. When you consider any use or application of AKM product stipulated in this document (“Product”), please make inquiries the sales office of AKM or authorized distributors as to current status of the Products. 1. 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This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of AKM. 015000004-E-02 2015/07 - 18 -