AP3603 AKM | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 18
Technical content
[AP3603] 015000004-E-02 2015/07 - 1 - 1. General D escription 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 Dual Output Application Dual Phase Application Applications Input Voltage Output Voltage Output Current Output Power Circuit Power Amplifier 12V 20V CH-1 7.5A CH-2 7.5A CH-1 150W CH-2 150W Dual Output Booster 200W class 6.4V 12V CH-1 17A CH-2 17A CH-1 204W CH-2 204W Dual Output Booster 400W class 6.4V 12V 34A 400W Dual Phase Single Output High Power Dual Output Step-Up DC-DC Controller AP3603 D D C C B B A A Title Number RevisionSize Date: 2014/09/12 Sheet of File: C:\\Users\\..\\AP3603_140912.SchDoc Drawn By : Vin PWON Vout R10 R11 R12 FB2 CC2 SS GND2 PWON RT GND1 RSP1 RSP2 RSN1 RSN2 FSYN DRV1 DRV2 VDD CC1 FB1 MDC D D C C B B A A Title Number RevisionSize Date: 2014/09/12 Sheet of File: C:\\Users\\..\\AP3603do_140912.SchDoc Drawn By : Vin PWON CH-1 Vout R10 R11 R12 FB2 CC2 SS GND2 PWON RT GND1 RSP1 RSP2 RSN1 RSN2 FSYN DRV1 DRV2 VDD CC1 FB1 MDC CH-2 Vout
[AP3603] 015000004-E-02 2015/07 - 2 - 3. Table of Content s
[AP3603] 015000004-E-02 2015/07 - 3 - 4. Block Diagram CC1 FB1 FBamp1 Vref Vref GND2 V5 UVLOcomp Vref 3.6V Control Logic DRV2 SS RSN1 Vcnt. PWMcomp1 V5Reg. Iss PWON Reset OSC Reset VO OVPcomp FB Vrefx1.35 iRAMP Set PWON Level Shift1 Reset OCLcomp1 RT FSYN Vref V8Reg. VDD DRV1 RSP1 V8 UVLOcomp Vref MDC VDD Max Duty Control RSP1 UVLOcomp Vref Vref RSP2 UVLOcomp Reset VDD OVPcomp VDD Vref CSamp1 SS SS CC2 FB2 FBamp2 +3.6V RSN2 Vcnt. PWMcomp2 Reset iRAMP Reset OCLcomp2 Vref RSP2 CSamp2 SS Level Shift2 GND1 5. Ordering Guide AP3603 -40～125°C 20-pin HTSSOP
[AP3603] 015000004-E-02 2015/07 - 4 - 6. Pin C onfigurations and Functions ■ Pin Configurations FSYN RT FB1 CC1 GND1 SS CC2 FB2 PWON MDC RSP2 RSN2 DRV2 VDD GND2 DRV1 RSN1 RSP1 (Top View) Exposed Pad
[AP3603] 015000004-E-02 2015/07 - 5 - ■ Functions No. Pin Name I/O Function
1 FSYN I
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.
2 RT I
Connect the resistor to GND1 for setting the PWM frequency. Refer 12.2 Operational Frequency Setting to calculate the resistance.
3 FB1 I
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 GND 1, a nd voltage divide node of feedback resistance should be connected to FB1 pin.
4 CC1 O
CH1 Error Amplifier Output Pin Connect the resistance and capacitor in parallel between CC1 pin and SS pin to compensate phase stability.
5 GND1 -
Connect GND2 at just below the AP3603 to prevent potential difference between this pin and the GND2 pin.
6 SS O
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.
7 CC2 O
CH2 Error Amplifier Output Pin Connect the resistance and capacitor in parallel between CC2 pin and SS pin to compensate phase stability.
8 FB2 I
CH2 Output Voltage Feedback Pin Connect the feedback resistance between the positive side of output capacitor and GND1 during dual output application usage. V oltage divid e node of feedback resistance should be connected to FB2 pin. Connect this pin to FB1 pin at the dual phase single output application usage.
9 PWON I
After “H” signal input, the internal voltage source V5 is powered up and then the start-up sequence is initiated.
10 MDC O
Set the maximum on time by the external resistance connecting between MDC and GND1.
11 RSP2 I CH2 Current Detect Positive Pin
12 RSN2 I CH2 Current Detect Negative Pin
13 DRV2 O CH2 N-channel MOSFET Drive Pin
14 V4 O
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.
15 V8 O
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.
16 VDD - Main Power Source Pin
17 GND2 -
Connect the GND1 at just below the AP3603 to prevent potential difference between this pin and the GND1 pin.
18 DRV1 O CH1 N-channel MOSFET Drive Pin
19 RSN1 I CH1 Current Detect Negative Pin
20 RSP1 I CH1 Current Detect Positive Pin
Note 2. Connect GND1 and GND2 at just below the AP3603 on PCB. operation is not guaranteed at these extremes. Figure 1. Power Dissipation
- Recommended Operating Conditions
WARNING: AKM assumes no responsibility for the usage beyond the conditions in this data sheet.
[AP3603] 015000004-E-02 2015/07 - 7 - 9. Electrical Characteristics （VVDD=12V，Tj=-40～145°C unless otherwise specified.） Parameter Symbol min typ max Unit Condition Output Voltage Range Vout - - 60 V 8V Driver Power Source V8 7.6 8.0 8.3 V 4V Drive Power Source V4 3.7 4.0 4.2 V Feedback Voltage VrefFB 3.51 3.58 3.69 V Shutdown Current 1 ISDN1 - - 10 uA VDD supply, VDD=10～20V, PWON=0V Shutdown Current 2 ISDN2 - - 2 uA RSP1/2supply, RSP1/2 =10～ 36V, PWON=0V Static Circuit Current1 ISUPPLY1 - - 3.5 uA VDD supply Static Circuit Current2 ISUPPLY2 - - 250 uA RSP1/2 supply, RSP1/2 =10～ 36V Power-ON Voltage VPWON 2.4 - - V Power-OFF Voltage VPWOFF - - 0.6 V Power-ON Pin Current “H” IPWONON - 15 - uA VPWON=5V(Input Current) Power-ON Pin Current “L” IPWONOFF - - 1.5 uA VPWON=0V(Output Current) V8 Output Under Voltage Protection（UVP） V8UVP 5.0 5.28 5.6 V V8 UVP Hysteresis V8UVLOhys 0.2 0.28 0.4 V RSP Input Under Voltage Protection（UVP） RSPUVP 3.5 3.75 4.2 V RSP Input Under Voltage Protection Release RSPUVLO DIS 4.2 4.5 4.8 V Soft Start Pin Charge Current ISSON 8.5 10 11.5 uA Soft Start Time TSS - 12 - ms Css=0.1uF Over Current Detect Voltage VOCL 80 100 120 mV Voltage between RSP and RSN Output Over Voltage Protection OVP 130 139 150 ％ Ratio to Reference Voltage of Feedback VDD Over Voltage Protection VDDOVP 21.5 - - V Oscillation Frequency Fclk -14 0 14 ％ 40k～500kHz setting Dual Phase 80k～1000kHz External Synchronous Clock Input Range Fsync 80 - 120 ％ Fclk(typ)Ratio. External Synchronous Clock Input threshold Vsync 0.6 - 2.4 V External N-channel MOSFET Switching Time (Note 4) Trise 80 100 150 ns CL=10nF 10%to90% VVDD=13V f=250kHz Tfall 20 55 150 ns CL=10nF 90%to10% VVDD=13V f=250kHz Minimum On Time MINON - 200 - ns Minimum Off Time MINOFF - 250 - ns RMDC＞127kΩ Thermal Protection Operating Temperature (Note 4,Note 5) TSD - 175 - °C Thermal Protection Hysteresis (Note 4,Note 5) TSDhys - 15 - °C 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.
[AP3603] 015000004-E-02 2015/07 - 8 - 10. Functional Descriptions
10.1 Basic Op eration
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 Protectio n (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.
10.8 CC1 and CC2 Pin Voltage (Error Amplifier output) Clamping Function
10.9 External Synchronous Operation
Figure 2. External Synchronous Timing Chart
[AP3603] 015000004-E-02 2015/07 - 10 - 11. Timing Chart DRV OVP Level FB(VOUT) SS OCL Level VDD(RSP) PWON TSD 100% 100% 139% OCL&OVP制御 12ms 3.6V 4.2ms PWM制御 Figure 3.Timing Chart OCL&OVP control PWM control 4.2 ms
[AP3603] 015000004-E-02 2015/07 - 11 - 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. ]V[R4 R316.3Vout CH1 ＝ ]V[R6 R516.3Vout CH2 ＝
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.
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. ][100Frequency)250ns1(DutyMax ％ ＝
12.4 Maximum Output Voltage
The maximum output voltage depends on maximum ON duty. It is estimated by the next equation. [V]Duty1.1 VinVoutMax ＝ ][41.5V3.2pF 1.2V HzFrequency 5.0R7 Ω ＝
- Recommended External circuits
Figure 12. Dual Output Step Up Application
Figure 13. Dual Phase Step-Up Application
[AP3603] 015000004-E-02 2015/07 - 16 - 16. Package ■ Outline D imensions ・20-pin HTSSOP (Unit : mm) ■ Marking XXXXXXX (1) 1pin Indication (2) Product No. (3) Date Code (7digits) (1) AP3603 (3) (2)
[AP3603] 015000004-E-02 2015/07 - 17 - 17. Revise History Date (YY/MM/DD) Revision Page Contents 15/02/09 00 - First edition 15/03/12 01 8 Add 10.7 Quasi-Foldback Over Current Protection (PWM operation) 15/07/30 02 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.
[AP3603] 015000004-E-02 2015/07 - 18 - 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. All information included in this document are provided only to illustrate the operation and a pplication examples of AKM Products . AKM neither makes warranties or representations with respect to the accuracy or completeness of the information contained in this document nor grants any license to any intellectual property rights or any other rights of AKM or any third party with respect to the information in this document. You are fully responsible for use of such information contained in this document in your product design or applications . AKM ASSUMES NO LIABILITY FOR ANY LOSSES INCURRED BY YOU OR THIRD PARTIES ARISING FROM THE USE OF SUCH INFORMATION IN YOUR PRODUCT DESIGN OR APPLICATIONS. 2. The Product is neither intended nor warranted for use in equipment or systems that require extraordinarily high levels of quality and/or reliability and/or a malfunction or failure of which may cause loss of human life, bodily injury, serious property damage or serious public impact, including but not limited to, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions, safety devices, elevators and escalators, devices related to electric power, and equipment used in fin ance-related fields. Do not use Product for the above use unless specifically agreed by AKM in writing. 3. Though AKM works continually to improve the Product’s quality and reliability, you are responsible for complying with safety standards and for provid ing adequate designs and safeguards for your hardware, software and systems which minimize risk and avoid situations in which a malfunction or failure of the Product could cause loss of human life, bodily injury or damage to property, including data loss o r corruption. 4. Do not use or otherwise make available the Product or related technology or any information contained in this document for any military purposes, including without limitation, for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology products (mass destruction weapons). When exporting the Products or related technology or any information contained in this document, you should comply with the applicable export control laws and regulations and follow the procedures required by such laws and regulations. The Products and related technology may not be used for or incorporated into any products or syste ms whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations. 5. Please contact AKM sales representative for details as to environmental matters such as the RoHS compatibility of the Product. Please use the Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. AKM assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 6. Resale of the Product with provisions different from the statement and/or technical features set forth in this document shall immediately void any warranty granted by AKM for the Product and shall not create or extend in any manner whatsoever, any liability of AKM. 7. This document may not be reproduced or duplicated, in any form, in whole or in part, without prior written consent of AKM.