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L6571 Datasheet(PDF) 1 Page - STMicroelectronics

Part # L6571
Description  High voltage half bridge driver with oscillator
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6571 Datasheet(HTML) 1 Page - STMicroelectronics

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January 2010
Doc ID 4946 Rev 6
1/12
12
L6571
High voltage half bridge driver with oscillator
Features
■ High voltage rail up to 600 V
■ BCD off line technology
■ 15.6 V Zener clamp on Vs
■ Driver current capability:
– Sink current = 270 mA
– Source current = 170 mA
■ Very low start up current: 150 mA
■ Undervoltage lockout with hysteresis
■ Programmable oscillator frequency
■ Dead time 1.25 μs (L6571A) or 0.72 μs
(L6571B)
■ dV/dt immunity up to ±50 V/ns
■ ESD protection
Description
The device is a high voltage half bridge driver with
built in oscillator. The frequency of the oscillator
can be programmed using external resistor and
capacitor.
The internal circuitry of the device allows it to be
driven also by external logic signal.
The output drivers are designed to drive external
nchannel power MOSFET and IGBT. The internal
logic assures a dead time to avoid cross-
conduction of the power devices.
Two version are available: L6571A and L6571B.
They differ in the internal dead time: 1.25
μs and
0.72
μs (typ.)
DIP-8
SO8
Figure 1.
Block diagram
www.st.com


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