®
RBO40-40G/T
REVERSED BATTERY AND
OVERVOLTAGE PROTECTION
Application Specific Discretes
A.S.D.™
FEATURES
■
■
■
■
■
■
PROTECTION AGAINST “LOAD DUMP” PULSE
40A DIODE TO GUARD AGAINST BATTERY
REVERSAL
MONOLITHIC STRUCTURE FOR GREATER
RELIABILITY
BREAKDOWN VOLTAGE : 24 V min.
CLAMPING VOLTAGE : ± 40 V max.
COMPLIANT WITH ISO / DTR 7637
D
2
PAK
RBO40-40G
DESCRIPTION
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.
TO220-AB
RBO40-40T
FUNCTIONAL DIAGRAM
1
3
2
TM : TRANSIL and ASD are trademarks of STMicroelectronics.
September 2005 - Ed:6
1/10
RBO40-40G / RBO40-40T
ABSOLUTE MAXIMUM RATINGS
Symbol
I
FSM
I
F
V
PP
P
PP
T
stg
/Tj
T
L
Parameter
Non repetitive surge peak forward current
(Diode D1)
DC forward current (Diode D1)
Peak load dump voltage (see note 1and 2)
5 pulses (1 minute between each pulse)
Peak pulse power between Input and Output
(Transil T1)
Tj initial = 25°C
10/1000 µs
tp = 10 ms
Tc = 75°C
Value
120
40
80
1500
- 40 to + 150
260
Unit
A
A
V
W
°C
°C
Storage and operating junction temperature range
Maximum lead temperature for soldering during 10 s
at 4.5mm from case for TO220-AB
Note 1 :
for a surge greater than the maximum value, the device will fail in short-circuit.
Note 2 :
see Load Dump curves.
THERMAL RESISTANCE
Symbol
Rth (j-c)
Rth (j-a)
Junction to case
Junction to ambient
Parameter
RBO40-40G
RBO40-40T
RBO40-40T
Value
1.0
1.0
60
Unit
°C/W
°C/W
D1
1
3
I32
I13
I
F
Ipp32
T1
2
T2
I
R
32
I
R M
32
V
CL
31 V
BR
31 V
R M
31
V
F
13
I
R M
31
I
R
31
V13
V
R M
32 V
B R
32 V
C L
32
V32
1
3
Ipp31
2
Ex :V
F 13 . between Pin 1 and Pin 3 VBR 32 . between Pin 3 and Pin 2
2/10
RBO40-40G / RBO40-40T
Symbol
V
RM31
/V
RM32
V
BR31
/V
BR32
I
R31
/I
R32
V
CL31
/V
CL32
V
F13
I
PP
αT
C
31
/C
32
C
13
Parameter
Stand-off voltage Transil T1 / Transil T2.
Breakdown voltage Transil T1 / Transil T2.
Leakage current Transil T1 / Transil T2.
Clamping voltage Transil T1 / Transil T2.
Forward voltage drop Diode D1.
Peak pulse current.
Temperature coefficient of V
BR
.
Capacitance Transil T1 / Transil T2.
Capacitance of Diode D1
ELECTRICAL CHARACTERISTICS : DIODE D1
(- 40°C < T
amb
< + 85°C)
Symbol
V
F 13
V
F 13
V
F 13
V
F 13
C
13
I
F
= 40 A
I
F
= 20A
I
F
= 1 A
I
F
= 100 mA
F = 1MHz V
R
= 0 V
3000
Test Conditions
Value
Min.
Typ.
Max.
1.9
1.45
1
0.95
Unit
V
V
V
V
pF
ELECTRICAL CHARACTERISTICS : TRANSIL T1
(- 40°C < T
amb
< + 85°C)
Symbol
V
BR 31
V
BR 31
I
RM 31
I
RM 31
V
CL 31
α
T
C
31
I
R
= 1 mA
I
R
= 1 mA, T
amb
= 25°C
V
RM
= 20 V
V
RM
= 20 V, T
amb
= 25°C
I
PP
= 37.5A, Tj initial = 25°C
Temperature coefficient of V
BR
F = 1MHz
V
R
= 0 V
3000
10/1000µs
Test Conditions
Value
Min.
22
24
Typ.
Max.
35
32
100
10
40
9
Unit
V
V
µA
µA
V
10
-4
/°C
pF
ELECTRICAL CHARACTERISTICS : TRANSIL T2
(- 40°C < T
amb
< + 85°C)
Symbol
V
BR 32
V
BR 32
I
RM 32
I
RM 32
V
CL 32
α
T
C
32
I
R
= 1 mA
I
R
= 1 mA, T
amb
= 25°C
V
RM
= 20 V
V
RM
= 20 V, T
amb
= 25°C
I
PP
= 20 A (note 1)
Temperature coefficient of V
BR
F = 1MHz
V
R
= 0 V
8000
Test Conditions
Value
Min.
22
24
Typ.
Max.
35
32
100
10
40
9
Unit
V
V
µA
µA
V
10
-4
/°C
pF
Note 1 :
One pulse, see pulse definition in load dump test generator circuit.
3/10
RBO40-40G / RBO40-40T
PRODUCT DESCRIPTION
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).
1
3
2
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
BATTERY
D1
T2
T1
MOTOR
Filter
RBO
DEVICE
MOTOR CONTROL
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.
4/10
RBO40-40G / RBO40-40T
PINOUT configuration in D
2
PAK :
- Input (1) :
- Output (3) :
- Gnd (2) :
Marking
:
Pin 1
Pin 3
Connected to base Tab
Logo, date code, RBO40-40G
D1
T2
T1
TAB
PINOUT configuration in TO220AB :
- Input (1) :
- Output (3) :
- GND (2) :
Marking
:
Pin 1
Pin 3
Connected to base Tab
Logo, date code, RBO40-40T
D1
T2
T1
(TAB)
5/10
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