EA4527YH Datasheet, PDF (1/14 Pages) Active-Semi, Inc – 40V/3.0A CV/CC Buck Converter Featuring USB-PD

ACT4527
Rev 2, 06-Jan-2017
40V/3.0A CV/CC Buck Converter Featuring USB-PD
FEATURES
 USB-PD Support
 Passes USB-IF Certification: Test ID 1010060
 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
 Hiccup Mode Protection at Output Short
 >90% Efficiency at Full Load
 0.5mA Low Standby Input Current
 5.1V/9.1V/12.1V Output Over-Voltage Protection
 Cord Voltage Compensation
 Meet EN55022 Class B Radiated EMI Standard
 SOP-8EP Package
APPLICATIONS
 Car Charger
 Cigarette Lighter Adaptor (CLA)
 Rechargeable Portable Device
 CV/CC regulation DC/DC converter
Typical Application Circuit
GENERAL DESCRIPTION
ACT4527 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. ACT4527 has an
interface for USB-PD control via a tri-state digital
pin. Vout is 5.1V if this pin is floating, Vout is 9.1V
when this pin voltage is less than 0.8V and Vout is
12.1V while this pin voltage is more than 2.0V.
ACT4527 has accurate output current limits under
constant current regulation. It provides up to 3.0A
output current at 125kHz switching frequency.
ACT4527 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.
This device is available in a SOP-8EP package and
require very few external components for operation.
4.5V to 40V
C1
C2
47ìF 10ìF
C3
CSN HSB
22nF
IN
SW
ACT4527
CSP
GND PDC
D1
SK54L
L1
40ìH
C4
22ìF
Rcs
20mÙ
C5
C6
220ìF 2.2ìF
5V/9V/12V
Vout
CC1
CC2
GND
V/I Profile
* Patent Pending
Innovative Power^TM
I/O
CC1
CC2
USB-PD Controller
Vout
12.1V
9.1V
5.1V
3.2V
Iout
3.3A
-1-
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