HS01G datasheet(5/18 Pages) INFINEON

5 / 18 page

Version 2.0

24 August 2009

Half-Bridge Resonant Controller

ICE1HS01G

Pin Configuration and Functionality

Pin Configuration and

Functionality

1.1

Pin configuration with PG-DSO-8

Figure 1

Pin configuration with PG-DSO-8

1.2

Pin Functionality

FMIN (minimum switching frequency)

An external resistor is connected between this pin and

the ground. The voltage of this pin is constant during

operation and thus the resistance determines the

current flowing out of this pin. The minimum switching

frequency is determined by this current. The maximum

switching frequency and the switching frequency

during soft start are also related to the current flowing

out of FMIN pin.

CS(current sense)

The current sense signal is fed to this pin. Inside the IC,

two comparators are provided. If the voltage on CS pin

is higher than the first threshold, IC will increase the

switching frequency to limit the maximum output power

of the converter. If the voltage on this pin exceeds the

second threshold, IC will be latched off immediately.

FB (feedback)

This pin is connected to the collector of the opto-

coupler. Internally, during normal operation, this pin is

connected to reference voltage source with a pull-up

resistor(RFB). The IC uses the voltage on this pin to

adjust the switching frequency within the range of

maximum and minimum frequency set by FMIN pin. If

FB voltage is higher than VFBH for a certain fixed

blanking time, an extended timer will be started. If over

load/open loop protection exists longer than the

extended blanking time, IC will enter auto-restart mode.

An off timer starts from the instant IC stops switching till

IC starts another soft start. This off time is determined

by the resistors and capacitor connected to VINS pin.

VINS (mains input voltage sense)

The mains input voltage is fed to this pin via a resistive

voltage divider. If the voltage on VINS pin is higher than

the threshold VINSON, IC will start to operate with

softstart when VCC increases beyond turn on

threshold. During operation, if the voltage on this pin

falls below the threshold VINSON, IC will stop switching

until the voltage on this pin increases again.

When IC goes into over load protection mode, IC will

stop switching and try to restart after a period of time.

This period can be adjusted by connectting different

capacitors between this pin and ground.

GND (ground)

IC common ground.

LG (low side gate drive)

Low side power MOSFET driver.

HG (high-side gate drive)

Up side power MOSFET driver.

VCC (IC power supply)

Supply voltage of the IC.

Symbol

Function

FMIN

Minimum switching frequency

Current sense

Feedback voltage

VINS

Input voltage sense

GND

IC ground

Low side gate drive

High side gate drive

VCC

IC power supply

FMIN

VINS

5GND

VCC

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