lt1336cs-trpbf Linear Technology Corporation, lt1336cs-trpbf Datasheet

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lt1336cs-trpbf

Manufacturer Part Number
lt1336cs-trpbf
Description
Half-bridge N-channel Power Mosfet Driver With Boost Regulator
Manufacturer
Linear Technology Corporation
Datasheet
APPLICATIONS
FEATURES
TYPICAL
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
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
+
12V
0Hz TO 100kHz
10µF
25V
PWM
R
2Ω
1/4W
SENSE
APPLICATION
10
2
5
3
4
U
SGND
SV
PV
UVOUT
INTOP
INBOTTOM
1N4148
I
SENSE
+
+
6
1
LT1336
SWGND
15
200µH*
TSOURCE
BGATEDR
TGATEDR
TGATEFB
BGATEFB
SWITCH
BOOST
PGND
U
7
16
14
13
12
11
9
8
+
1N4148
C
1µF
BOOST
HV = 40V MAX**
IRFZ44
IRFZ44
DESCRIPTION
The LT
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.
+
®
1000µF
100V
Half-Bridge N-Channel
1336 is a cost effective half-bridge N-channel
Power MOSFET Driver
with Boost Regulator
** FOR HV > 40V SEE “DERIVING THE FLOATING
* SUMIDA RCR-664D-221KC
INTOP INBOTTOM
SUPPLY WITH THE FLYBACK TOPOLOGY” IN
APPLICATIONS INFORMATION SECTION
H
H
L
L
U
H
H
L
L
TGATEDR
H
L
L
L
BGATEDR
LT1336
H
L
L
L
1336 TA01
sn1336 1336fs
1

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lt1336cs-trpbf Summary of contents

Page 1

... 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. 16 1N4148 40V MAX** + 1000µ ...

Page 2

... INTOP INBOTTOM BGATE INFORMATION TOP VIEW ORDER PART NUMBER 1 16 SWITCH 2 15 SWGND 3 14 BOOST LT1336CN 4 13 TGATEDR LT1336CS 5 TGATEFB 12 LT1336IN 6 11 TSOURCE LT1336IS + BGATEDR S PACKAGE 16-LEAD PLASTIC SO NARROW = 125°C, θ = 70° 125°C, θ = 110°C/ W (S) ...

Page 3

... J dissipation P according to the following formulas: D LT1336CN/LT1336IN )(70° LT1336CS/LT1336IS )(110° Note 2: Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See Typical Performance Characteristics and Applications Information sections. + Test Circuit 25° ...

Page 4

LT1336 W U TYPICAL PERFORMANCE CHARACTERISTICS DC Supply Current vs Supply Voltage TSOURCE 20 18 BOTH INPUTS HIGH OR LOW LOW INTOP V = HIGH V = HIGH INBOTTOM INTOP 10 ...

Page 5

W U TYPICAL PERFORMANCE CHARACTERISTICS Top or Bottom Input Pin Current vs Input Voltage 5 12V 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0 INPUT VOLTAGE ...

Page 6

LT1336 W U TYPICAL PERFORMANCE CHARACTERISTICS V Regulated Output BOOST vs Temperature 12.0 11.5 11.0 V – V BOOST TSOURCE 10.5 10.0 9.5 9.0 8.5 8.0 –50 – TEMPERATURE (° PIN FUNCTIONS I (Pin 1): ...

Page 7

U U FUNCTIONAL DIAGRA + SENSE – 6V 480mV + 2 BIAS INTOP 5V 3k INBOTTOM 4 5V UVOUT 5 SGND 6 7 PGND BGATEFB 8 W TRIP = 10.6V TOP UV TRIP ...

Page 8

LT1336 TEST CIRCUIT 2Ω + V/I 1µF 3k 50Ω * SUMIDA RCR-664D-221KC DIAGRA 2V INTOP 0.8V 2V INBOTTOM 0.8V 12V TOP GATE DRIVER 12V 10V BOTTOM GATE 2V DRIVER ...

Page 9

U OPERATIO (Refer to Functional Diagram) The LT1336 incorporates two independent driver chan- nels with separate inputs and outputs. The inputs are TTL/CMOS compatible; they can withstand input voltages + as high The 1.4V input threshold is ...

Page 10

LT1336 U U APPLICATIONS INFORMATION In applications where switching is always above 10kHz and the duty cycle never exceeds 90%, Pins 1, 15 and 16 can be left open. The bootstrap capacitor is then charged by conventional bootstrapping. Only a ...

Page 11

U U APPLICATIONS INFORMATION Using the components as shown in Figure 2 the flyback regulator will run at around 800kHz. To lower the fre- quency C can be increased and to increase the FILTER frequency C can be decreased. FILTER ...

Page 12

LT1336 U U APPLICATIONS INFORMATION Paralleling MOSFETs When the above calculations result in a lower R is economically feasible with a single MOSFET, two or more MOSFETs can be paralleled. The MOSFETs will inherently share the currents according to their ...

Page 13

U U APPLICATIONS INFORMATION ⎛ ⎞ OUT Switch On = Total Period ⎜ ⎟ HV ⎝ ⎠ ⎛ ⎞ HV – OUT Switch Off = Total Period ⎜ ⎟ HV ⎝ ⎠ Note that for HV ...

Page 14

LT1336 U U APPLICATIONS INFORMATION most power supplies cannot sink current, this current can raise the voltage of the high voltage rail. This can be avoided by placing a discharge resistor between HV sup- ply and ground to divert the ...

Page 15

... Kool Mµ registered trademark of Magnetics, Inc. Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 16

... N16 0695 0.386 – 0.394* (9.804 – 10.008 0.150 – 0.157 S16 0695 LT/GP 0796 7K • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1996 5V 1136 F08 sn1336 1336fs sn1336 1336fs ...

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