Document
ACT4526
Rev 1.2, December 28th, 2015
40V/3.0A CV/CC Buck Converter Featuring QC2.0 Certified
FEATURES
Qualcomm® Quick Charge™ 2.0 Certified 40V Input Voltage Surge 4.5V-36V Operational Input Voltage 5.1V/9.1V/12.1V Output with +/-1% Accuracy Up to 3.0A Output current Constant Current Regulation Limit QC2.0 Decoding Hiccup Mode Protection at Output Short >90% Efficiency at Full Load 0.5mA Low Standby Input Current 5.7V/10.1V/13.5V Output Over-voltage
Protection for 5.1V/9.1V/12.1V Outputs
Cord Voltage Compensation Meet EN55022 Class B Radiated EMI Standard 8kV ESD HBM Protection on DP and DM SOP-8EP Package
APPLICATIONS
Car Charger Cigarette Lighter Adaptor (CLA) Rechargeable Portable Device CV/CC regulation DC/DC converter
GENERAL DESCRIPTION
ACT4526 is a wide input voltage, high efficiency step-down DC/DC converter that operates in either CV (Constant Output Voltage) mode or CC (Constant Output Current) mode. ACT4526 has QC2.0 decoding built in to provide 5.1V/9.1V/12.1V outputs as requested by attached portable devices. ACT4526 has accurate output current limits under constant current regulation to meet MFi specification. ACT4526 provides up to 3.0A output current at 125kHz switching frequency. ACT4526 utilizes adaptive drive technique to achieve good EMI performance while main >90% efficiency at full load for mini size CLA designs. It also has output short circuit protection with hiccup mode. The average output current is reduced to below 6mA when output is shorted to ground. Other features include output over voltage protection and thermal shutdown. ACT4526 is available in a SOP-8EP package and require very few external components for operation.
Typical Application Circuit
4.5V to 40V
C1 C2 47μF 10μF
CSN HSB
IN SW ACT4526 CSP
GND DP DM
C3 22nF
Rcs 25mΩ
L1 47μH
D1 SK54L
C4 C5
C6
22μF 220μF 2.2μF
5V/9V/12V
Vout DD+ GND
V/I Profile
Innovative PowerTM
Vout 12.1V
9.1V
5.1V 3.2V
Iout 2.65A
-1-
www.active-semi.com Copyright © 2015 Active-Semi, Inc.
ACT4526
Rev1.2, December 28th, 2015
ORDERING INFORMATION
PART NUMBER ACT4526YH-T
OPERATION TEMPERATURE RANGE
PACKAGE FREQUENCY
PACKING
-40°C to 85°C
SOP-8EP
125kHz
TAPE & REEL
PIN CONFIGURATION
CSP 1 CSN 2 NC 3
DP 4
ACT4526
GND
EP
SOP-8EP
Top View
8 HSB 7 SW 6 IN 5 DM
Innovative PowerTM
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PIN DESCRIPTIONS
ACT4526
Rev1.2, December 28th, 2015
PIN NAME
DESCRIPTION
1
CSP
Voltage Feedback Input. Connect to node of the inductor and output capacitor. CSP and CSN Kevin sense is recommended.
2
CSN
Negative input terminal of output current sense. Connect to the negative terminal of current sense resistor.
3 NC Not connected.
4
DP
Data Line Positive Input. Connected to D+ of attached portable device data line. This pin passes 8kV HBM ESD.
5
DM
Data Line Negative Input. Connected to D- of attached portable device data line. This pin passes 8kV HBM ESD.
6
IN
Power Supply Input. Bypass this pin with a 10μF ceramic capacitor to GND, placed as close to the IC as possible.
7 SW Power Switching Output to External Inductor.
8
HSB
High Side Bias Pin. This provides power to the internal high-side MOSFET gate driver. Connect a 22nF capacitor from HSB pin to SW pin.
9
GND
Ground and Heat Dissipation Pad. Connect this exposed pad to large ground copper area with copper and vias.
ABSOLUTE MAXIMUM RATINGS
PARAMETER IN to GND SW to GND HSB to GND CSP, CSN to GND All other pins to GND Junction to Ambient Thermal Resistance Operating Junction Temperature Storage Junction Temperature Lead Temperature (Soldering 10 sec.)
VALUE -0.3 to 40 -1 to VIN +1 VSW - 0.3 to VSW + 7 -0.3 to +15 -0.3 to +6
46 -40 to 150 -55 to 150
300
UNIT V V V V V
°C/W °C °C °C
: Do not exceed these limits to prevent damage to the device. Exposure to absolute maximum rating conditions for long periods may affect device reliability.
Innovative PowerTM
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ELECTRICAL CHARACTERISTICS
(VIN = 12V, TA = 25°C, unless otherwise specified.)
ACT4526
Rev1.2, December 28th, 2015
Parameter Input Over Voltage Protection
Symbol VIN_OVP Rising
Condition
Min Typ Max Units
40 42
44
V
Input Over Voltage Hysteresis
4V
Input Over Voltage Response Time T_VIN_OVP VIN step from 30V to 45V
Input Under Voltage Lockout (UVLO)
VIN Rising
Input UVLO Hysteresis
Input Voltage Power Good Deglitch Time
No OVP
Input Voltage Power Good Deglitch Time
No UVP
Input Standby Current
Vin=12V, Vout=5.1V, Iload=0
250 ns 4.5 V 200 mV 40 ms
10 us 500 uA
Output Voltage Regulation
CSP
5.05 5.1 5.15 9.0 9.1 9.2 11.95 12.1 12.25
V
Output Over Voltage Protection (OVP)
Output Over Voltage Deglitch Time Output Voltage Cord Compensation Output Under Voltage Protection (UVP) UVP Hysteresis UVP Deglitch Time UVP Blanking Time at Startup Output Constant Current Limit
Output rising
VOUT
VOUT VOUT
Output current 2.4A VOUT falling .