Active-semi ACT4529EVK1 Manual de usuario
UG105
Rev 1.0, 20-July-17
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ActiveSwitcher
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1
ACT4529EVK1 User’s Guide
USB Type C Car Charger Solution
Description
This document describes the characteristic and operation of the Active Semi ACT4529EVK1 evaluation kit
(EVK). It provides setup and operation instructions, schematic, layout, BOM, and test data. This EVK
demonstrates the ACT4529YH-T1011. Other ACT4529YH-Txxx options can be evaluated on this EVK by
replacing the IC and any other necessary components.
Features
The EVK is a complete, stand-alone USB-PD and QC2.0 car charger solution. It is built with an automotive car
charger form factor to show performance in a real form factor application. The EVK contains the high efficiency
ACT4925 step-down DC/DC converter that operates in either CV(Constant Output Voltage) mode or
CC(Constant Output Voltage) mode.
The EVK features a USB Type C output connector with USB-PD, QC2.0, and USB Auto Detect decoding
protocols. Decoding is implemented with an on-board FUSB302TMPX USB Type-C controller and
STM32F030F4P6 MCU. The EVK provides up to 3.0A output current at 125kHZ switching frequency. It operates
from Vin=12V to 36V and provides an output voltage of 5.1V, 9.1V, or 12.1V depending on the load’s requested
voltage. It charges Samsung and BC1.2 charging protocols at full charge current. Gerber files are available to
minimize time-to-market for applications that want to use the EVK as an end product.
Figure 1 – EVK Picture - Top
Figure 2 – EVK Picture - Bottom
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ActiveSwitcher
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Setup
Required Equipment
ACT4529EVK1 EVK
Power supply – 40V @ 4A for full power operation
Oscilloscope – >100MHz, >2 channels
Loads –Electronic/resistive load with 3.5A minimum current capability.
Digital Multimeters (DMM)
DC
Load
DC
Power
Figure 3 – EVK Setup
Hardware Setup
1. Connect a DC Power to the VIN and GND jumpers on the left side of the EVK.
2. Using a USB Type C connector, connect the EVK output to an electronic load.
3. Do not connecting anything to J2. J2 is a programming header.
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ActiveSwitcher
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Recommended Operating Conditions
Table 1. Recommended Operating Conditions
Parameter Description Min Typ Max Unit
VIN All buck input voltages 10 12 36 V
IOUT Maximum load current 3.0 A
EVK Operation
Turn on
Apply the 12V input voltage. The portable load can be connected before or after the input voltage is applied.
LED1 turn on to indicate that the buck converter is operational. LED2 turns on to indicate that the IC has properly
communicated with output load and is delivering power to the output connector.
PCB Layout
Top Layer
AGND Layer
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PGND Layer
Bottom Layer
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Test Results
Output Regulation
Float the PDC pin Vout is 5.1V, Connect the PDC pin to GND Vout is 9.1V, Connect the PDC pin to 3.3V(connect
to C14) Vout is 12.1V. Set DC electronic load to CC mode. Increase output current from 0A to 3A and measure
the output voltage on C3 capacitor.
5
5.1
5.2
5.3
0 500 1000 1500 2000 2500 3000
Output Voltage（V）
Output Current(mA)
Load Regulation
(Vin=24V)
Vo=5V
9
9.1
9.2
9.3
0 500 1000 1500 2000 2500 3000
Output Voltage（V）
Output Current(mA)
Load Regulation
(Vin=24V)
Vo=9V
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Efficiency (Ta=25℃)
12
12.1
12.2
12.3
0 500 1000 1500 2000 2500 3000
Output Voltage（V）
Output Current(mA)
Load Regulation
(Vin=24V)
Vo=12V
50%
60%
70%
80%
90%
100%
0 500 1000 1500 2000 2500 3000
Efficiency
Output Current(mA)
Efficiency (Vout=5.1V)
Vin=12V
Vin=18V
Vin=24V
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Power Loss
50%
60%
70%
80%
90%
100%
0 500 1000 1500 2000 2500 3000
Efficiency
Output Current(mA)
Efficiency (Vout=9.1V)
Vin=12V
Vin=18V
Vin=24V
50%
60%
70%
80%
90%
100%
0 500 1000 1500 2000 2500 3000
Efficiency
Output Current(mA)
Efficiency (Vout=12.1V)
Vin=18V
Vin=24V
0
500
1,000
1,500
2,000
2,500
3,000
0 500 1000 1500 2000 2500 3000
Power loss(mW)
Output Current(mA)
Power loss(Vout=5.1V)
Vin=12V
Vin=18V
Vin=24V
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Output Constant Current and Constant Voltage (Ta=25℃)
Set DC load to CC mode, increase output current from 0A to the maximum load current and measure the voltage
on the C3 capacitor. Then set DC electronic load to CV mode, decrease output voltage from maximum load
voltage to 0V and measure the output current and the output voltage on the C3 capacitor.
0
500
1,000
1,500
2,000
2,500
3,000
3,500
0 500 1000 1500 2000 2500 3000
Power loss(mW)
Output Current(mA)
Power loss(Vout=9.1V)
Vin=12V
Vin=18V
Vin=24V
0
500
1,000
1,500
2,000
2,500
3,000
3,500
0 500 1000 1500 2000 2500 3000
Power loss(mW)
Output Current(mA)
Power loss(Vout=12.1V)
Vin=18V
Vin=24V
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Vo=5.1V
Vo=9.1V
Vo=12.1V
3.0
3.5
4.0
4.5
5.0
5.5
6.0
0 500 1000 1500 2000 2500 3000 3500
Vout(V)
Output current(mA)
CC /CV profile
Vin=12V
vin=18V
Vin=24V
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
0 500 1000 1500 2000 2500 3000 3500
Vout(V)
Output current(mA)
CC /CV profile
Vin=12V
vin=18V
Vin=24V
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
0 500 1000 1500 2000 2500 3000 3500
Vout(V)
Output current(mA)
CC /CV profile
vin=18V
Vin=24V
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Standby Input Current
Current Limit vs. input voltage
Set DC electronic load to CV mode to measure the output current.
0
10
20
30
40
50
60
70
10 15 20 25 30 35 40
Input Current(mA)
Input Voltage(V)
Standby Input Current
Vo=5.1V
Vo=9.1V
Vo=12.1V
3000
3050
3100
3150
3200
3250
3300
10 15 20 25 30 35 40
Output Current(mA)
Input Voltage(V)
Current Limit VS. Input Voltage
Vo=5.1V
Vo=9.1V
Vo=12.1V
Tabla de contenidos
