33883 Datasheet, PDF (10/21 Pages) Freescale Semiconductor, Inc – H-Bridge Gate Driver IC

FUNCTIONAL DESCRIPTION
INTRODUCTION
FUNCTIONAL DESCRIPTION
INTRODUCTION
The 33883 is an H-bridge gate driver (or full-bridge pre-
driver) with integrated charge pump and independent high-
and low-side driver channels. It has the capability to drive
large gate-charge MOSFETs and supports high PWM
frequency. In sleep mode its supply current is very low.
FUNCTIONAL TERMINAL DESCRIPTION
SUPPLY VOLTAGE TERMINALS (VCC AND VCC2)
The VCC and VCC2 terminals are the power supply inputs
to the device. V_CC is used for the output high-side drivers and
the charge pump. V_CC2 is used for the linear regulation. They
can be connected together or independent with different
voltage values. The device can operate with V_CC up to 55 V
and V_CC2 up to 28 V.
The VCC and VCC2 terminals have undervoltage (UV)
and overvoltage (OV) shutdown. If one of the supply voltage
drops below the undervoltage threshold or rises above the
overvoltage threshold, the gate outputs are switched LOW in
order to switch off the external MOSFETs. When the supply
returns to a level that is above the UV threshold or below the
OV threshold, the device resumes normal operation
according to the established condition of the input terminals.
INPUT HIGH- AND LOW-SIDE TERMINALS
(IN_HS1, IN_HS2, AND IN_LS1, IN_LS2)
The IN_HSn and IN_LSn terminals are input control
terminals used to control the gate outputs. These terminals
are 5.0 V CMOS-compatible inputs with hysteresis. IN_HSn
and IN_LSn independently control GATE_HSn and
GATE_LSn, respectively.
During wake-up, the logic is supplied from the G_EN
terminal. There is no internal circuit to prevent the external
high-side and low-side MOSFETs from conducting at the
same time.
GLOBAL ENABLE (G_EN)
The G_EN terminal is used to place the device in a sleep
mode. When the G_EN terminal voltage is a logic LOW state,
the device is in sleep mode. The device is enabled and fully
operational when the G_EN terminal voltage is logic HIGH,
typically 5.0 V.
CHARGE PUMP OUT (CP_OUT)
The CP_OUT terminal is used to connect an external
reservoir capacitor for the charge pump.
CHARGE PUMP CAPACITOR TERMINALS
(C1 AND C2)
The C1 and C2 terminals are used to connect an external
capacitor for the charge pump.
LINEAR REGULATOR OUTPUT (LR_OUT)
The LR_OUT terminal is the output of the internal
regulator. It is used to connect an external capacitor.
GROUND TERMINALS
(GND_A, GND1 AND GND2)
These terminals are the ground terminals of the device.
They should be connected together with a very low
impedance connection.
SOURCE OUTPUT HIGH-SIDE TERMINALS
(SRC_HS1 AND SRC_HS2)
The SRC_HSn terminals are the sources of the external
high-side MOSFETs. The external high-side MOSFETs are
controlled using the IN_HSn inputs.
GATE HIGH- AND LOW-SIDE TERMINALS
(GATE_HS1, GATE_HS2, AND GATE_LS1,
GATE_LS2)
The GATE_HSn and GATE_LSn terminals are the gates
of the external high- and low-side MOSFETs. The external
high- and low-side MOSFETs are controlled using the
IN_HSn and IN_LSn inputs.
33883
10
Analog Integrated Circuit Device Data
Freescale Semiconductor