ETA9635

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1

Power Management Unit for Power Banks

DESCRIPTION

The ETA9635 is a fully integrated power management unit

specifically designed for Power Bank, Mobile Charger,

Backup Battery Charger applications. It consists of a high

efficiency synchronous step-up boost converter and a linear

battery charger. The boost can provide up to 1A output

current at 5V of from a Li-Ion battery input voltage, while the

charger can charge up to 1A of current from an AC adapter

input. The boost incorporates circuits that disconnect the

input from output, during shutdown, short-circuit, output

current overloading, or other events when output is higher

than the input. This not only eliminates the need for an

external MOSFET and its control circuitry to disconnect the

input from output, also provides robust output overload

protection. Using a patent pending technique to drive the

charger LED indicator, it eliminates the need for a micro-

controller normally needed in mobile chargers. While saving

the cost of a micro-controller, since the whole units only

consumes less than 50uA of quiescent current during no

load, when considering standby time for one charge, it is a

much superior solution comparing to the traditional solution

that needs a micro-controller which normally consumes up

to 1mA current.

ETA9635 is available in ESOP8 package.

FEATURES



2in 1: A Synchronous boost plus A Charger



Short-circuit Protection



5W Output Power for the Boost



Boost Output to Input Reversed Current Protection



Up to 1A Charging



Up to 96% Efficiency during Boosting





Programmable Charging Current

APPLICATIONS



Power Banks, Mobile back-up Battery Chargers

ORDERING INFORMATION

PART #

PACKAGE PIN TOP MARK

ETA9635E8A

ESOP-8

ETA9635

YWWPL

Date Code

Product Number

TYPICAL APPLICATION

GND

BATT

USB_OUT

6.8uH

EN_BST

4.7μF

SW

VBATT 3.6V

2

6.3V

22μF x2

4

2

3

1

4

2

3

1

AC_IN

ISET

LED

5

1K

Micro USB