High Current PN Half Bridge
BTN7970
Table of Contents
1
2
2.1
2.2
3
3.1
3.2
4
4.1
4.2
4.3
5
5.1
5.2
5.2.1
5.2.2
5.2.3
5.3
5.3.1
5.3.2
5.3.3
5.3.4
5.3.5
5.3.6
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.4.5
5.4.6
6
6.1
6.2
6.3
7
7.1
7.2
7.3
8
Overview
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Block Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin Configuration
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin Definitions and Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Product Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
6
8
8
Block Description and Characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Supply Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Stages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Stages - Static Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Switching Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Power Stages - Dynamic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Overvoltage Lock Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Undervoltage Shut Down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Overtemperature Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Current Limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Short Circuit Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electrical Characteristics - Protection Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Control and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Input Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Dead Time Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Adjustable Slew Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Status Flag Diagnosis With Current Sense Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical Characteristics - Control and Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Application Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Layout Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Half-bridge Configuration Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Package Outlines
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PG-TO263-7-1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PG-TO220-7-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PG-TO220-7-12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
22
22
23
24
24
25
26
Revision History
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Data Sheet
2
Rev. 1.1, 2007-11-21
High Current PN Half Bridge
NovalithIC™
BTN7970B
BTN7970P
BTN7970S
1
Features
•
Overview
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)
(for BTN7970B (SMD))
Low quiescent current of typ. 7
μA
@ 25
°C
PWM capability of up to 25 kHz combined with active freewheeling
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 behaviour
Overvoltage lock out
Undervoltage shut down
Driver circuit with logic level inputs
Adjustable slew rates for optimized EMI
Green Product (RoHS compliant)
AEC Qualified
•
•
•
•
•
•
•
•
•
•
•
•
PG-TO263-7-1
Description
The BTN7970 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 over-
temperature, overvoltage, undervoltage, overcurrent and short circuit.
The BTN7970 provides a cost optimized solution for protected high
current PWM motor drives with very low board space consumption.
PG-TO220-7-12
PG-TO220-7-11
Type
BTN7970B
BTN7970P
BTN7970S
Data Sheet
Package
PG-TO263-7-1
PG-TO220-7-11
PG-TO220-7-12
3
Marking
BTN7970B
BTN7970P
BTN7970S
Rev. 1.1, 2007-11-21
High Current PN Half Bridge
BTN7970
Block Diagram
2
Block Diagram
The BTN7970 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 BTN7970 can be combined with other BTN7970 to form H-bridge
and 3-phase drive configurations.
2.1
Block Diagram
VS
Undervolt.
detection
Overvolt.
detection
Current
Sense
Overcurr.
Detection
HS
Overtemp.
detection
IS
Digital Logic
IN
Gate Driver
HS
LS off
HS off
OUT
Gate Driver
LS
INH
SR
Slewrate
Adjustment
Overcurr.
Detection
LS
GND
Figure 1
Block Diagram
2.2
Terms
Following figure shows the terms used in this data sheet.
V
S
I
IN
IN
VS
I
VS
, -I
D( HS)
V
DS (HS )
V
IN
V
INH
V
SR
I
INH
INH
I
OUT
, I
L
O UT
I
SR
SR
V
SD (LS )
V
OUT
I
IS
IS
G ND
V
IS
I
GND ,
I
D( LS)
Figure 2
Data Sheet
Terms
4
Rev. 1.1, 2007-11-21
High Current PN Half Bridge
BTN7970
Pin Configuration
3
3.1
Pin Configuration
Pin Assignment
8
8
8
1234 5 67
1234567
1 23 45 6 7
Figure 3
Pin Assignment BTN7970B, BTN7970P and BTN7970S (top view)
3.2
Pin
1
2
3
4,8
5
Pin Definitions and Functions
Symbol
GND
IN
INH
OUT
SR
I/O
-
I
I
O
I
Function
Ground
Input
Defines whether high- or lowside switch is activated
Inhibit
When set to low device goes in sleep mode
Power output of the bridge
Slew Rate
The slew rate of the power switches can be adjusted by connecting
a resistor between SR and GND
Current Sense and Diagnostics
Supply
6
7
IS
VS
O
-
Bold type: pin needs power wiring
Data Sheet
5
Rev. 1.1, 2007-11-21
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