ICE1HS01G-1 Datasheet, PDF (5/19 Pages) Infineon Technologies AG – Half-Bridge Resonant Controller

Half-Bridge Resonant Controller
ICE1HS01G-1
Pin Configuration and Functionality
1
Pin Configuration and switching frequency and the switching frequency
during soft start are also related to the current flowing
Functionality
out of FMIN pin.
1.1 Pin configuration with PG-DSO-8
Pin Symbol Function
1
FMIN Minimum switching frequency
2
CS
Current sense
3
FB
Feedback voltage
4
VINS
Input voltage sense
5
GND
IC ground
6
LG
Low side gate drive
7
HG
High side gate drive
8
VCC
IC power supply
FMIN
1
8
VCC
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 (R_FB). 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 V_FBH 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.
CS
2
FB
3
VINS
4
VINS (mains input voltage sense)
The mains input voltage is fed to this pin via a resistive
7
HG ^{voltage divider. If the voltage on VINS pin is higher than}
the threshold V_INSON, IC will start to operate with
softstart when VCC increases beyond turn on
threshold. During operation, if the voltage on this pin
6
LG
falls below the threshold V_INSON, 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 connecting different
5
GND capacitors between this pin and ground.
Figure 1 Pin configuration with PG-DSO-8
GND (ground)
IC common ground.
LG (low side gate drive)
Low side power MOSFET driver.
1.2 Pin Functionality
HG (high-side gate drive)
Up side power MOSFET driver.
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
VCC (IC power supply)
Supply voltage of the IC.
Version 2.0
5
02 July 2011