LT1160 Datasheet, PDF (1/16 Pages) Linear Technology – Half-/Full-Bridge N-Channel Power MOSFET Drivers

LT1160/LT1162
Half-/Full-Bridge
N-Channel
Power MOSFET Drivers
FEATURES
s _{Floating Top Driver Switches Up to 60V}
s _{Drives Gate of Top N-Channel MOSFET}
above Load HV Supply
s _{180ns Transition Times Driving 10,000pF}
s _{Adaptive Nonoverlapping Gate Drives Prevent}
Shoot-Through
s _{Top Drive Protection at High Duty Cycles}
s _{TTL/CMOS Input Levels}
s _{Undervoltage Lockout with Hysteresis}
s _{Operates at Supply Voltages from 10V to 15V}
s _{Separate Top and Bottom Drive Pins}
U
APPLICATIONS
s _{PWM of High Current Inductive Loads}
s _{Half-Bridge and Full-Bridge Motor Control}
s _{Synchronous Step-Down Switching Regulators}
s _{3-Phase Brushless Motor Drive}
s _{High Current Transducer Drivers}
s _{Class D Power Amplifiers}
DESCRIPTION
The LT^®1160/LT1162 are cost effective half-/full-bridge
N-channel power MOSFET drivers. The floating driver can
drive the topside N-channel power MOSFETs operating off
a high voltage (HV) rail of up to 60V.
The internal logic prevents the inputs from turning on the
power MOSFETs in a half-bridge at the same time. Its
unique adaptive protection against shoot-through cur-
rents eliminates all matching requirements for the two
MOSFETs. This greatly eases the design of high efficiency
motor control and switching regulator systems.
During low supply or start-up conditions, the undervoltage
lockout actively pulls the driver outputs low to prevent the
power MOSFETs from being partially turned on. The 0.5V
hysteresis allows reliable operation even with slowly vary-
ing supplies.
The LT1162 is a dual version of the LT1160 and is available
in a 24-pin PDIP or in a 24-pin SO Wide package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATION
12V
+ _10µF
25V
PWM
0Hz TO 100kHz
1N4148
1 _SV+
10 _PV+
4
UV OUT
14
BOOST
13
T GATE DR
12
T GATE FB
11
T SOURCE
LT1160
2
IN TOP
9
B GATE DR
3
8
IN BOTTOM B GATE FB
SGND
5
PGND
6
+ _CBOOST
1µF
HV = 60V MAX
+
1000µF
100V
IRFZ44
IRFZ44
IN TOP IN BOTTOM T GATE DR B GATE DR
L
L
L
L
L
H
L
H
H
L
H
L
H
H
L
L
1160 TA01
1