LT1336 Datasheet

IC型號：
LT1336
PDF描述：
Half-Bridge N-Channel Power MOSFET Driver with Boost Regulat...
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LT1336

Half-Bridge N-Channel

Power MOSFET Driver

with Boost Regulator

FEATURES

DESCRIPTION

The LT

廬

1336 is a cost effective half-bridge N-channel

power MOSFET driver. The floating driver can drive the

topside N-channel power MOSFETs operating off a high

voltage (HV) rail of up to 60V (absolute maximum). In

PWM operation an on-chip switching regulator maintains

charge in the bootstrap capacitor even when approaching

and operating at 100% duty cycle.

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.

, LTC and LT are registered trademarks of Linear Technology Corporation.

Floating Top Driver Switches Up to 60V

Internal Boost Regulator for DC Operation

Drives Gate of Top N-Channel MOSFET

above Supply

180ns Transition Times Driving 10,000pF

Adaptive Nonoverlapping Gate Drives Prevent

Shoot-Through

Top Drive Maintained at High Duty Cycles

TTL/CMOS Input Levels

Undervoltage Lockout with Hysteresis

Operates at Supply Voltages from 10V to 15V

Separate Top and Bottom Drive Pins

APPLICATIONS

PWM of High Current Inductive Loads

Half-Bridge and Full-Bridge Motor Control

Synchronous Step-Down Switching Regulators

3-Phase Brushless Motor Drive

High Current Transducer Drivers

Class D Power Amplifiers

TYPICAL APPLICATION

12V

1N4148

200碌H*

SENSE

2鈩?/div>

1/4W

SENSE

SWITCH

BOOST

1N4148

HV = 40V MAX**

10碌F

25V

PWM

0Hz TO 100kHz

IRFZ44

TGATEDR

LT1336

TGATEFB

TSOURCE

UVOUT

BGATEDR

INTOP

BGATEFB

INBOTTOM

SGND

SWGND

PGND

1000碌F

100V

BOOST

1碌F

INTOP INBOTTOM TGATEDR

IRFZ44

*SUMIDA RCR-664D-221KC

**FOR HV > 40V SEE 鈥淒ERIVING THE FLOATING

SUPPLY WITH THE FLYBACK TOPOLOGY鈥?IN

APPLICATIONS INFORMATION SECTION

BGATEDR

1336 TA01

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