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RBO40-40G/T
REVERSED BATTERY AND
OVERVOLTAGE PROTECTION
September 2003 - Ed:5
Application Specific Discretes
A.S.D.TM
D
2
PAK
RBO40-40G
TO220-AB
RBO40-40T
1
2
3
FUNCTIONAL DIAGRAM
s
PROTECTION AGAINST "LOAD DUMP" PULSE
s
40A DIODE TO GUARD AGAINST BATTERY
REVERSAL
s
MONOLITHIC STRUCTURE FOR GREATER
RELIABILITY
s
BREAKDOWN VOLTAGE : 24 V min.
s
CLAMPING VOLTAGE : 40 V max.
s
COMPLIANT WITH ISO / DTR 7637
FEATURES
Designed to protect against battery reversal and
load dump overvoltages in automotive applica-
tions, this monolithic component offers multiple
functions in the same package :
D1 : reversed battery protection
T1 : clamping against negative overvoltages
T2 : Transil function against "load dump" effect.
DESCRIPTION
TM : TRANSIL and ASD are trademarks of STMicroelectronics.
RBO40-40G / RBO40-40T
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Symbol
Parameter
Value
Unit
I
FSM
Non repetitive surge peak forward current
(Diode D1)
tp = 10 ms
120
A
I
F
DC forward current (Diode D1)
Tc = 75C
40
A
V
PP
Peak load dump voltage (see note 1and 2)
5 pulses (1 minute between each pulse)
80
V
P
PP
Peak pulse power between Input and Output
(Transil T1)
Tj initial = 25C
10/1000 s
1500
W
T
stg
Tj
Storage temperature range
Maximum junction temperature
- 40 to + 150
150
C
T
L
Maximum lead temperature for soldering during 10 s
at 4.5mm from case for TO220-AB
260
C
Note 1 : for a surge greater than the maximum value, the device will fail in short-circuit.
Note 2 : see Load Dump curves.
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
Rth (j-c)
Junction to case
RBO40-40G
RBO40-40T
1.0
1.0
C/W
Rth (j-a)
Junction to ambient
RBO40-40T
60
C/W
THERMAL RESISTANCE
D1
T1
2
3
1
V
CL
31
V
R M
31
V
F
13
V13
I13
I
R M
31
I
R
31
Ipp31
V
BR
31
T2
I
F
Ipp32
V
R M
32 V
B R
32 V
C L
32
3
2
1
V32
I32
I
R
32
I
R M
32
Ex :VF 13 . between Pin 1 and Pin 3 VBR 32 . between Pin 3 and Pin 2
RBO40-40G / RBO40-40T
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Symbol
Test Conditions
Value
Unit
Min.
Typ.
Max.
V
F 13
I
F
= 40 A
1.9
V
V
F 13
I
F
= 20A
1.45
V
V
F 13
I
F
= 1 A
1
V
V
F 13
I
F
= 100 mA
0.95
V
C
13
F = 1MHz V
R
= 0 V
3000
pF
ELECTRICAL CHARACTERISTICS : DIODE D1 (- 40C < T
amb
< + 85C)
Symbol
Parameter
V
RM31
/V
RM32
Stand-off voltage Transil T1 / Transil T2.
V
BR31
/V
BR32
Breakdown voltage Transil T1 / Transil T2.
I
R31
/I
R32
Leakage current Transil T1 / Transil T2.
V
CL31
/V
CL32
Clamping voltage Transil T1 / Transil T2.
V
F13
Forward voltage drop Diode D1.
I
PP
Peak pulse current.
T
Temperature coefficient of V
BR
.
C
31
/C
32
Capacitance Transil T1 / Transil T2.
C
13
Capacitance of Diode D1
Symbol
Test Conditions
Value
Unit
Min.
Typ.
Max.
V
BR 31
I
R
= 1 mA
22
35
V
V
BR 31
I
R
= 1 mA, T
amb
= 25C
24
32
V
I
RM 31
V
RM
= 20 V
100
A
I
RM 31
V
RM
= 20 V, T
amb
= 25C
10
A
V
CL 31
I
PP
= 37.5A, Tj initial = 25C
10/1000s
40
V
T
Temperature coefficient of V
BR
9
10
-4
/C
C
31
F = 1MHz
V
R
= 0 V
3000
pF
ELECTRICAL CHARACTERISTICS : TRANSIL T1 (- 40C < T
amb
< + 85C)
Symbol
Test Conditions
Value
Unit
Min.
Typ.
Max.
V
BR 32
I
R
= 1 mA
22
35
V
V
BR 32
I
R
= 1 mA, T
amb
= 25C
24
32
V
I
RM 32
V
RM
= 20 V
100
A
I
RM 32
V
RM
= 20 V, T
amb
= 25C
10
A
V
CL 32
I
PP
= 20 A (note 1)
40
V
T
Temperature coefficient of V
BR
9
10
-4
/C
C
32
F = 1MHz
V
R
= 0 V
8000
pF
Note 1 : One pulse, see pulse definition in load dump test generator circuit.
ELECTRICAL CHARACTERISTICS : TRANSIL T2 (- 40C < T
amb
< + 85C)
RBO40-40G / RBO40-40T
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PRODUCT DESCRIPTION
1
2
3
The RBO has 3 functions integrated on the same
chip.
D1 : "Diode function" in order to protect against
reversed battery operation.
T2 : "Transil function" in order to protect against
positive surge generated by electric systems
(ignition, relay. ...).
T1 : Protection for motor drive application
(See below).
BASIC APPLICATION
* The monolithic multi-function protection
(RBO) has been developed to protect sen-
sitive semiconductors in car electronic
modules against both overvoltage and
battery reverse.
* In addition, the RBO circuit prevents
overvoltages generated by the module from
affecting the car supply network.
MOTOR DRIVER APPLICATION
D1
T1
T2
BATTERY
RBO
DEVICE
MOTOR CONTROL
MOTOR
Filter
In this application, one half of the motor drive circuit is supplied through the "RBO" and is thus protected
as per its basic function application.
The second part is connected directly to the "car supply network" and is protected as follows :
- For positive surges : T2 (clamping phase) and D1 in forward-biased.
- For negative surges : T1 (clamping phase) and T2 in forward-biased.
RBO40-40G / RBO40-40T
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- Input
(1) :
Pin 1
- Output (3) :
Pin 3
- Gnd
(2) :
Connected to base Tab
Marking
:
Logo, date code, RBO40-40G
PINOUT configuration in D
2
PAK :
D1
T1
T2
TAB
D1
T1
T2
(TAB)
- Input
(1) :
Pin 1
- Output (3) :
Pin 3
- GND
(2) :
Connected to base Tab
Marking
:
Logo, date code, RBO40-40T
PINOUT configuration in TO220AB :
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