L6571A_0009 Datasheet, PDF (1/8 Pages) STMicroelectronics – HIGH VOLTAGE HALF BRIDGE DRIVER WITH OSCILLATOR

L6571A
L6571B
HIGH VOLTAGE HALF BRIDGE
DRIVER WITH OSCILLATOR
s HIGH VOLTAGE RAIL UP TO 600V
s BCD OFF LINE TECHNOLOGY
s 15.6V ZENER CLAMP ON V_S
s DRIVER CURRENT CAPABILITY:
- SINK CURRENT = 270mA
- SOURCE CURRENT = 170mA
s VERY LOW START UP CURRENT: 150µA
s UNDER VOLTAGE LOCKOUT WITH
HYSTERESIS
s PROGRAMMABLE OSCILLATOR
FREQUENCY
s DEAD TIME 1.25µs (L6571A) or 0.72µs
(L6571B)
s dV/dt IMMUNITY UP TO ±50V/ns
s 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 capaci-
Minidip
SO8
ORDERING NUMBERS:
L6571A
L6571AD
L6571B
L6571BD
tor. The internal circuitry of the device allows it to be
driven also by external logic signal.
The output drivers are designed to drive external n-
channel power MOSFET and IGBT. The internal log-
ic 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: 1.25µs and
0.72µs (typ.)
BLOCK DIAGRAM
C_VS
V_S
1
R_HV
BOOT
8
H.V.
R_F 2
R_F
C_F 3
C_F
GND 4
September 2000
BIAS
REGULATOR
LEVEL
SHIFTER
V_S
7 HVG
HIGH
SIDE
DRIVER
BUFFER
6 OUT
COMP
COMP
LOGIC
V_S
LOW SIDE
DRIVER
5
LVG
C_BOOT
LOAD
D96IN433
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