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驱动芯片BTN7971资料
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最新驱动芯片英文详细资料,BTN7971.通过电流大于BTS/btn之前的7970.
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BTN7971B
High Current PN Half Bridge
NovalithIC™
Data Sheet, Rev. 2.0, June 2008
Automotive Power
Data Sheet 2 Rev. 2.0, 2008-06-27
High Current PN Half Bridge
BTN7971B
1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Pin Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1 Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.2 Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 General Product Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Block Description and Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Supply Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 Power Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.2.1 Power Stages - Static Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2.2 Switching Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2.3 Power Stages - Dynamic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.3 Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.1 Overvoltage Lock Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.2 Undervoltage Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.3 Overtemperature Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.4 Current Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.3.5 Short Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.3.6 Electrical Characteristics - Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
5.4 Control and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.1 Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.2 Dead Time Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.3 Adjustable Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.4 Status Flag Diagnosis With Current Sense Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.4.5 Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.4.6 Electrical Characteristics - Control and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6 Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.1 Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2 Layout Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.3 Half-bridge Configuration Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
7 Package Outlines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Table of Contents
PG-TO263-7-1
Type Package Marking
BTN7971B PG-TO263-7-1 BTN7971B
Data Sheet 3 Rev. 2.0, 2008-06-27
High Current PN Half Bridge
NovalithIC™
BTN7971B
1Overview
Features
• Path resistance of max. 30.5 mΩ @ 150 °C (typ. 16 mΩ @ 25 °C)
High Side: max. 12.8 mΩ @ 150 °C (typ. 7 mΩ @ 25 °C)
Low Side: max. 17.7 mΩ @ 150 °C (typ. 9 mΩ @ 25 °C)
• Low quiescent current of typ. 7 μA @ 25 °C
• PWM capability of up to 25 kHz combined with active freewheeling
• Enhanced switching speed for reduced switching losses
• Switched mode current limitation for reduced power dissipation
in overcurrent
• Current limitation level of 50 A min. / 70 A typ. (low side)
• Status flag diagnosis with current sense capability
• Overtemperature shut down with latch behavior
• Overvoltage lock out
• Undervoltage shut down
• Driver circuit with logic level inputs
• Adjustable slew rates for optimized EMI
• Green Product (RoHS compliant)
• AEC Qualified
Description
The BTN7971B is a integrated high current half bridge for motor drive applications. It is part of the NovalithIC™
family containing one p-channel highside MOSFET and one n-channel lowside MOSFET with an integrated driver
IC in one package. Due to the p-channel highside switch the need for a charge pump is eliminated thus minimizing
EMI. Interfacing to a microcontroller is made easy by the integrated driver IC which features logic level inputs,
diagnosis with current sense, slew rate adjustment, dead time generation and protection against overtemperature,
overvoltage, undervoltage, overcurrent and short circuit.
The BTN7971B provides a cost optimized solution for protected high current PWM motor drives with very low
board space consumption.
Data Sheet 4 Rev. 2.0, 2008-06-27
High Current PN Half Bridge
BTN7971B
Block Diagram
2 Block Diagram
The BTN7971B is part of the NovalithIC™ family containing three separate chips in one package: One p-channel
highside MOSFET and one n-channel lowside MOSFET together with a driver IC, forming a integrated high current
half-bridge. All three chips are mounted on one common lead frame, using the chip on chip and chip by chip
technology. The power switches utilize vertical MOS technologies to ensure optimum on state resistance. Due to
the p-channel highside switch the need for a charge pump is eliminated thus minimizing EMI. Interfacing to a
microcontroller is made easy by the integrated driver IC which features logic level inputs, diagnosis with current
sense, slew rate adjustment, dead time generation and protection against overtemperature, overvoltage,
undervoltage, overcurrent and short circuit. The BTN7971B can be combined with other BTN7971B to form H-
bridge and 3-phase drive configurations.
2.1 Block Diagram
Figure 1 Block Diagram
2.2 Terms
Following figure shows the terms used in this data sheet.
Figure 2 Terms
IS
SR
INH
IN
GND
OUT
VS
Gate Driver
HS
Slewrate
Adjustment
Digital Logic
Overvolt.
detection
Overtemp.
detection
Overcurr.
Detection
LS
Overcurr.
Detection
HS
Current
Sense
Undervolt.
detection
Gate Driver
LS
LS off HS off
I
IN
V
IN
OUT
I
INH
V
INH
V
SR
I
SR
V
IS
I
IS
V
S
I
OUT
, I
L
V
OUT
V
DS (HS )
GND
I
GND,
I
D(LS)
I
VS
, -I
D(HS)
IN
INH
SR
IS
VS
V
SD(LS )
Data Sheet 5 Rev. 2.0, 2008-06-27
High Current PN Half Bridge
BTN7971B
Pin Configuration
3 Pin Configuration
3.1 Pin Assignment
Figure 3 Pin Assignment BTN7971B (top view)
3.2 Pin Definitions and Functions
Bold type: pin needs power wiring
Pin Symbol I/O Function
1GND -Ground
2 IN I Input
Defines whether high- or lowside switch is activated
3 INH I Inhibit
When set to low device goes in sleep mode
4,8 OUT O Power output of the bridge
5SR ISlew Rate
The slew rate of the power switches can be adjusted by connecting
a resistor between SR and GND
6 IS O Current Sense and Diagnostics
7 VS - Supply
1
2
35
6
7
4
8
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