TD340 Datasheet, PDF (1/21 Pages) STMicroelectronics – H-BRIDGE QUAD POWER MOSFET DRIVER FOR DC MOTOR CONTROL

TD340
H-BRIDGE QUAD POWER MOSFET DRIVER
FOR DC MOTOR CONTROL
s QUAD N-CHANNEL MOSFET DRIVE
s INTEGRATED CHARGE PUMP FOR HIGH
SIDE MOSFET DRIVING
s VERY LOW GROUND EMI NOISE
s MOTOR SPEED AND DIRECTION CON-
TROL (LOW SIDE PWM)
s INTERNAL OR EXTERNAL PWM SOURCE
s 25kHz SWITCHING FREQUENCY ABILITY
s SYNCHRONOUS HIGH SIDE RECTIFICA-
TION
s REVERSED BATTERY ACTIVE PROTEC-
TION ABILITY
s INTEGRATED 5V POWER SUPPLY FOR
MICROCONTROLLER
s INTEGRATED SECURITY CIRCUITS:
UVLO, OVLO, WATCHDOG
s 60V MAX RATING
DESCRIPTION
The TD340 integrated circuit allows N-Channel
Power Mosfets driving in a full H-bridge
configuration and is best suited for DC Motor
Control Applications. The four drivers outputs are
designed to allow 25kHz MOSFET switching.
The speed and direction of the motor are to be set
by two pins. Voltage across the motor is controlled
by low side Pulse Width Modulation (PWM). This
PWM feature can be made internally when the
input pin is connected to an analog signal, or it can
be given directly from a digital source.
An internal charge pump allows proper upper
MOS driving for full static operation (100% PWM).
TD340 achieves very low EMI noise thanks to its
balanced charge pump structure and its drivers
moderate slew rate.
To avoid excessive heating due to free wheeling,
appropriate synchronous rectification is achieved
on the corresponding High Side MOSFET.
Moreover, TD340 integrates a 5V voltage
regulator suitable as a power supply output for the
microcontroller, a Reset circuit and a Watchdog
circuit.
Security functions disable the TD340 (MOS off)
when abnormal conditions occur like overvoltage,
undervoltage or CPU loss of control (watchdog).
TD340 withstands transients as met in automotive
field without special protection devices thanks to
its 60V BCD technology.
PRELIMINARY DATA
D
SO20
(Plastic Micropackage)
ORDER CODE
Part Number Temperature Range
TD340ID
-40°C, +125°C
Package
D
•
D = Small Outline Package (SO) - also available in Tape & Reel (DT)
PIN CONNECTIONS (top view)
VBATT 1
VOUT 2
RESET 3
CWD 4
WD 5
STBY 6
TEMP 7
IN1 8
IN2 9
CF 10
20 OSC
19 CB1
18 H1
17 S1
16 CB2
15 H2
14 S2
13 L2
12 L1
11 GND
May 2000
1/21
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.