SM72295MA/NOPB National Semiconductor, SM72295MA/NOPB Datasheet

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SM72295MA/NOPB

Manufacturer Part Number
SM72295MA/NOPB
Description
Dual Gate Driver-Solar
Manufacturer
National Semiconductor
Series
SolarMagic™r
Datasheet

Specifications of SM72295MA/NOPB

Applications
Photovoltaics
Current - Supply
25µA
Voltage - Supply
3 V ~ 7 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
28-SOIC (0.295", 7.50mm Width)
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
© 2011 National Semiconductor Corporation
Photovoltaic Full Bridge Driver
General Description
The SM72295 is designed to drive 4 discrete N type
MOSFET’s in a full bridge configuration. The drivers provide
3A of peak current for fast efficient switching and integrated
high speed bootstrap diodes. Current sensing is provided by
2 transconductance amplifiers with externally programmable
gain and filtering to remove ripple current to provide average
current information to the control circuit. The current sense
amplifiers have buffered outputs available to provide a low
impedance interface to an A/D converter if needed. An exter-
nally programmable input over voltage comparator is also
included to shutdown all outputs. Under voltage lockout with
a PGOOD indicator prevents the drivers from operating if
VCC is too low.
Typical Application Circuit
301341
SM72295
Features
Package
Renewable Energy Grade
Dual Half Bridge MOSFET Drivers
Integrated 100V bootstrap diodes
Independent High and Low driver logic inputs
Bootstrap supply voltage range up to 115V DC
Two current sense amplifiers with externally
programmable gain and buffered outputs
Programmable over voltage protection
Supply rail under-voltage lockouts with power good
indicator
SOIC-28
February 25, 2011
www.national.com
30134101

Related parts for SM72295MA/NOPB

SM72295MA/NOPB Summary of contents

Page 1

... A/D converter if needed. An exter- nally programmable input over voltage comparator is also included to shutdown all outputs. Under voltage lockout with a PGOOD indicator prevents the drivers from operating if VCC is too low. Typical Application Circuit © 2011 National Semiconductor Corporation SM72295 Features ■ Renewable Energy Grade ■ ...

Page 2

Connection Diagram Ordering Information Order Number SM72295X SM72295E www.national.com Top View SOIC-28 Description NSC Package Drawing 28L SOIC WIDE M28B 28L SOIC WIDE M28B 2 30134116 Supplied As 1000 Units in Tape and Reel 250 Units in Tape and Reel ...

Page 3

Pin Descriptions Pin Name Description 5 AGND Analog ground 23 PGND Power ground return 21,25 VCCA, Positive gate drive supply VCCB 26,20 HBA, High side gate driver bootstrap HBB rail. 27, 19 HOA, High side gate driver output HOB 28, ...

Page 4

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VCCA, VCCB VDD HBA to HSA, HBB to HSB LIA,LIB,HIA,HIB,OVS LOA,LOB HOA,HOB SIA,SOA,SIB,SOB SIA to SOA, SIB to SOB HSA,HSB (note 5) HBA, HBB PGOOD, OVP ...

Page 5

Symbol Parameter LO & HO GATE DRIVER V Low-Level Output Voltage OL V High-Level Output Voltage OH I Peak Pullup Current OHL I Peak Pulldown Current OLL t LO Turn-Off Propagation Delay LI Falling to LO Falling LPHL t LO ...

Page 6

Block Diagram www.national.com FIGURE 1. Block Diagram 6 30134102 ...

Page 7

Typical Performance Characteristics Operating Current vs Temperature VCC Quiescent Current vs Temperature VDD Quiescent Current vs Temperature VCC Undervoltage Rising Threshold vs Temperature 30134111 VCC Undervoltage Threshold Hysteresis vs Temperature 30134112 Gate Drive High Level Output Voltage vs Temperature 30134115 ...

Page 8

Gate Drive Low level Output Voltage vs Temperature Current Sense Amplifier Input Offset Voltage vs Temperature Timing Diagram www.national.com Bootstrap Diode Forward Voltage vs Temperature 30134110 Current Sense Amplifier Output Buffer Offset Voltage vs 30134107 FIGURE 2. 8 30134106 Temperature ...

Page 9

Power Dissipation Considerations The total IC power dissipation is the sum of the gate driver losses and the bootstrap diode losses. The gate driver losses are related to the switching frequency (f), output load capac- itance on LO and HO ...

Page 10

Physical Dimensions www.national.com NS Package Drawing M28B 10 30134150 ...

Page 11

Physical Dimensions inches (millimeters) unless otherwise noted 20-Lead TSSOP Package NS Package Number MXA20A 11 www.national.com ...

Page 12

... For more National Semiconductor product information and proven design tools, visit the following Web sites at: www.national.com Products Amplifiers www.national.com/amplifiers Audio www.national.com/audio Clock and Timing www.national.com/timing Data Converters www.national.com/adc Interface www.national.com/interface LVDS www.national.com/lvds Power Management www.national.com/power Switching Regulators www.national.com/switchers LDOs www.national.com/ldo LED Lighting www ...

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