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LT1158IN Datasheet

  • LT1158IN

  • Half Bridge N-Channel Power MOSFET Driver

  • 20頁

  • LINER

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LT1158
Half Bridge N-Channel
Power MOSFET Driver
FEATURES
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DESCRIPTION
A single input pin on the LT1158 synchronously controls
two N-channel power MOSFETs in a totem pole configura-
tion. Unique adaptive protection against shoot-through
currents eliminates all matching requirements for the two
MOSFETs. This greatly eases the design of high efficiency
motor control and switching regulator systems.
A continuous current limit loop in the LT1158 regulates
short-circuit current in the top power MOSFET. Higher
start-up currents are allowed as long as the MOSFET V
DS
does not exceed 1.2V. By returning the fault output to the
enable input, the LT1158 will automatically shut down in
the event of a fault and retry when an internal pull-up
current has recharged the enable capacitor.
An on-chip charge pump is switched in when needed to
turn on the top N-channel MOSFET continuously. Special
circuitry ensures that the top side gate drive is safely
maintained in the transition between PWM and DC opera-
tion. The gate-to-source voltages are internally limited to
14.5V when operating at higher supply voltages.
Drives Gate of Top Side MOSFET Above V
+
Operates at Supply Voltages from 5V to 30V
150ns Transition Times Driving 3000pF
Over 500mA Peak Driver Current
Adaptive Non-Overlap Gate Drives
Continuous Current Limit Protection
Auto Shutdown and Retry Capability
Internal Charge Pump for DC Operation
Built-In Gate Voltage Protection
Compatible with Current-Sensing MOSFETs
TTL/CMOS Input Levels
Fault Output Indication
APPLICATIONS
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PWM of High Current Inductive Loads
Half Bridge and Full Bridge Motor Control
Synchronous Step-Down Switching Regulators
Three-Phase Brushless Motor Drive
High Current Transducer Drivers
Battery-Operated Logic-Level MOSFETs
TYPICAL APPLICATION
24V
1N4148
BOOST DR
BOOST
T GATE DR
T GATE FB
T SOURCE
0.1碌F
IRFZ34
+
10碌F
V
+
V
+
+
500碌F
LOW
ESR
PWM
0Hz TO
100kHz
INPUT
LT1158
SENSE
+
+
R
SENSE
0.015鈩?/div>
LOAD
+
1碌F
ENABLE
FAULT
BIAS
SENSE
鈥?/div>
B GATE DR
B GATE FB
GND
鈥?/div>
IRFZ34
0.01碌F
LT1158 TA01
U
U
U
Top and Bottom Gate Waveforms
V
IN
= 24V
R
L
= 12鈩?/div>
1158 TA02
1

LT1158IN 產(chǎn)品屬性

  • LT1158

  • 25

  • 集成電路 (IC)

  • PMIC - MOSFET，電橋驅(qū)動器 - 外部開關(guān)

  • -

  • 半橋

  • PWM

  • -

  • 500mA

  • 1

  • 2

  • 56V

  • 5 V ~ 30 V

  • -40°C ~ 85°C

  • 通孔

  • 16-DIP（0.300"，7.62mm）

  • 16-PDIP

  • 管件

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