SIP11206 Datasheet, PDF (1/19 Pages) Vishay Siliconix – Half-Bridge Controller with Primary MOSFET Drivers for Intermediate Bus Converters

SiP11206
Vishay Siliconix
Half-Bridge Controller with Primary MOSFET Drivers for
Intermediate Bus Converters
DESCRIPTION
SiP11206 is a controller for the primary side of a half-bridge
intermediate bus converter (IBC). It is ideally suited for
isolated applications such as telecom, data communications
and other products requiring an IBC architecture and
conversion of standard bus voltages such as 48 V to a lower
intermediate voltage, where high efficiency is required at low
output voltages (24 V, 12 V, 9 V or 5 V).
Designed to operate within the telecom voltage range of
36 V to 75 V and withstand 100 V transients for a period of
100 ms, the IC is designed for controlling and driving both
the low- and high-side switching devices of a half-bridge
converter.
The SiP11206 operates with a fixed duty cycle to provide the
highest efficiency over a wide input voltage range. SiP11206
has advanced current monitoring and control circuitry, which
allows the user to set the maximum current in the primary
circuit. This feature acts as protection against overcurrent,
output short circuit. Current sensing is by means of a sense
resistor connected in series with the primary low-side
MOSFET.
TYPICAL APPLICATION CIRCUIT
Vin+
36 V to 75 V
100 V/100 ms
Vin-
FEATURES
• 36 V to 75 V input voltage range
• Withstand 100 V, 100 ms transient capability
• Integrated ± 1.6 A typical high- and low-side MOSFET
drivers
• Oscillator frequency is programmable from 200 kHz to
1 MHz and can be externally synchronized
• High voltage pre-regulator operates during start-up
• Current sensing on primary low-side switch
• Hiccup mode
• System low input voltage detection
• Chip UVLO function
• Programmable soft-start function
• Over temperature protection (160 °C)
• Greater than 95 % efficiency
APPLICATIONS
• Intermediate bus architectures
• Telecom and Datacom
• Routers and servers
• Storage area network
• Base station
• 1/8 and 1/4 bricks
1
VINDET
2
VIN
3
VCC
4
COMP
5
CS
6
AGND
7
VREF
8
ROSC
SiP11206
16
BST
15
DH
14
LX
13
DL
12
PGND
11
SS
10
RDB
9
COSC
Vo+
Vo-
RDB
Document Number: 69232
S-81795-Rev. C, 04-Aug-08
www.vishay.com
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