BTS 612 N1
Smart Two Channel Highside Power Switch
Features
Product Summary
Overvoltage protection
Operating voltage
• Overload protection
• Current limitation
• Short circuit protection
• Thermal shutdown
• Overvoltage protection (including load dump)
• Fast demagnetization of inductive loads
• Reverse battery protection1)
• Undervoltage and overvoltage shutdown with
auto-restart and hysteresis
• Open drain diagnostic output
• Open load detection in OFF-state
• CMOS compatible input
• Loss of ground and loss of Vbb protection
• Electrostatic discharge (ESD) protection
Vbb(AZ)
Vbb(on)
43
5.0 ... 34
both
channels:
each parallel
200
100 mΩ
2.3
4.4
A
4
4
A
On-state resistance RON
Load current (ISO) IL(ISO)
Current limitation
IL(SCr)
TO-220AB/7
7
Application
1
• µC compatible power switch with diagnostic
Standard
feedback for 12 V and 24 V DC grounded loads
• All types of resistive, inductive and capacitve loads
• Replaces electromechanical relays, fuses and discrete circuits
7
7
1
Straight leads
1
SMD
General Description
N channel vertical power FET with charge pump, ground referenced CMOS compatible input and diagnostic
feedback, monolithically integrated in Smart SIPMOS technology. Fully protected by embedded protection
functions.
Voltage
source
V
3
IN1
6
IN2
Level shifter
sensor
Rectifier 1
Logic
4
PROFET
Current
limit 2
GND
2
OUT1
1
Temperature
sensor 1
Open load
Short to Vbb
detection 1
Level shifter
Rectifier 2
1)
+ V bb
Gate 1
protection
Limit for
unclamped
ind. loads 1
Charge
pump 1
Charge
pump 2
ST
Current
limit 1
Logic
Voltage
ESD
5
Overvoltage
protection
Gate 2
protection
Limit for
unclamped
ind. loads 2
OUT2
Temperature
sensor 2
7
Load
Open load
Short to Vbb
detection 2
Signal GND
Load GND
With external current limit (e.g. resistor RGND=150 Ω) in GND connection, resistor in series with ST
connection, reverse load current limited by connected load.
Semiconductor Group
V
V
1
BTS 612 N1
Parameter and Conditions, each channel
Symbol
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Values
min
typ
max
Unit
Pin
Symbol
Function
1
OUT1 (Load, L)
Output 1, protected high-side power output of channel 1
2
GND
Logic ground
3
IN1
Input 1, activates channel 1 in case of logical high signal
4
Vbb
5
ST
Positive power supply voltage,
the tab is shorted to this pin
Diagnostic feedback: open drain, low on failure
6
IN2
Input 2, activates channel 2 in case of logical high signal
7
OUT2 (Load, L)
Output 2, protected high-side power output of channel 2
Maximum Ratings at Tj = 25 °C unless otherwise specified
Parameter
Supply voltage (overvoltage protection see page 4)
Supply voltage for full short circuit protection
Tj Start=-40 ...+150°C
Load dump protection2) VLoadDump = UA + Vs, UA = 13.5 V
RI3)= 2 Ω, RL= 5.3 Ω, td= 200 ms, IN= low or high
Load current (Short circuit current, see page 5)
Operating temperature range
Storage temperature range
Power dissipation (DC), TC ≤ 25 °C
Inductive load switch-off energy dissipation, single pulse
Vbb = 12V, Tj,start = 150°C, TC = 150°C const.
one channel, IL = 2.3 A, ZL = 89 mH, 0 Ω:
both channels parallel, IL = 4.4 A, ZL = 47 mH, 0 Ω:
Symbol
Vbb
Vbb
43
34
Unit
V
V
60
V
IL
Tj
Tstg
Ptot
self-limited
-40 ...+150
-55 ...+150
36
A
°C
EAS
290
580
mJ
1.0
2.0
kV
-10 ... +16
±2.0
±5.0
V
mA
VLoad dump4)
Values
W
see diagrams on page 9
Electrostatic discharge capability (ESD)
(Human Body Model)
IN: VESD
all other pins:
acc. MIL-STD883D, method 3015.7 and ESD assn. std. S5.1-1993
VIN
IIN
IST
Input voltage (DC)
Current through input pin (DC)
Current through status pin (DC)
see internal circuit diagrams page 8
2)
3)
4)
Supply voltages higher than Vbb(AZ) require an external current limit for the GND and status pins, e.g. with a
150 Ω resistor in the GND connection and a 15 kΩ resistor in series with the status pin. A resistor for the
protection of the input is integrated.
RI = internal resistance of the load dump test pulse generator
VLoad dump is setup without the DUT connected to the generator per ISO 7637-1 and DIN 40839
Semiconductor Group
2
BTS 612 N1
Parameter and Conditions, each channel
Symbol
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Values
min
typ
max
Unit
Values
typ
max
-3.5
-7.0
-75
37
Unit
Values
min
typ
max
Unit
Thermal Characteristics
Parameter and Conditions
Thermal resistance
Symbol
chip - case, both channels: RthJC
each channel:
junction - ambient (free air): RthJA
SMD version, device on PCB5):
min
----
K/W
Electrical Characteristics
Parameter and Conditions, each channel
Symbol
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Load Switching Capabilities and Characteristics
On-state resistance (pin 4 to 1 or 7)
IL = 1.8 A
Tj=25 °C: RON
each channel
Tj=150 °C:
Nominal load current, ISO Norm (pin 4 to 1 or 7)
VON = 0.5 V, TC = 85 °C
each channel: IL(ISO)
both channels parallel:
Output current (pin 1 or 7) while GND disconnected
or GND pulled up, Vbb=30 V, VIN= 0, see diagram
page 9
Turn-on time
IN
to 90% VOUT:
Turn-off time
IN
to 10% VOUT:
RL = 12 Ω, Tj =-40...+150°C
Slew rate on
10 to 30% VOUT, RL = 12 Ω, Tj =-40...+150°C
Slew rate off
70 to 40% VOUT, RL = 12 Ω, Tj =-40...+150°C
5)
--
160
200
400
1.8
3.5
320
2.3
4.4
--
--
--10
ton
toff
80
80
200
200
400
400
µs
dV /dton
0.1
--
1
V/µs
-dV/dtoff
0.1
--
1
V/µs
IL(GNDhigh)
mΩ
A
mA
Device on 50mm*50mm*1.5mm epoxy PCB FR4 with 6cm2 (one layer, 70µm thick) copper area for Vbb
connection. PCB is vertical without blown air.
Semiconductor Group
3
BTS 612 N1
Parameter and Conditions, each channel
Symbol
Values
min
typ
max
Vbb(on)
Vbb(under)
Vbb(u rst)
5.0
3.5
--
----
Vbb(ucp)
--
∆Vbb(under)
Vbb(over)
Vbb(o rst)
∆Vbb(over)
Vbb(AZ)
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Operating Parameters
Operating voltage6)
Undervoltage shutdown
Undervoltage restart
Tj =-40...+150°C:
Tj =-40...+150°C:
Tj =-40...+25°C:
Tj =+150°C:
Undervoltage restart of charge pump
see diagram page 12
Undervoltage hysteresis
∆Vbb(under) = Vbb(u rst) - Vbb(under)
Overvoltage shutdown
Tj =-40...+150°C:
Overvoltage restart
Tj =-40...+150°C:
Overvoltage hysteresis
Tj =-40...+150°C:
)
7
Overvoltage protection
Tj =-40...+150°C:
Ibb=40 mA
Standby current (pin 4),
VIN=0
Tj=-40...+150°C:
Operating current (Pin 2)8), VIN=5 V
both channels on, Tj =-40...+150°C,
Operating current (Pin 2)8)
one channel on, Tj =-40...+150°C:,
6)
7)
8)
V
V
V
5.6
34
5.0
5.0
7.0
7.0
--
0.2
--
V
34
33
-42
--0.5
47
43
----
V
V
V
V
4
V
µA
Ibb(off)
IGND
---
90
0.6
150
1.2
mA
IGND
--
0.4
0.7
mA
At supply voltage increase up to Vbb= 5.6 V typ without charge pump, VOUT ≈Vbb - 2 V
See also VON(CL) in table of protection functions and circuit diagram page 8.
Add IST, if IST > 0, add IIN, if VIN>5.5 V
Semiconductor Group
Unit
BTS 612 N1
Parameter and Conditions, each channel
Symbol
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Protection Functions
Initial peak short circuit current limit (pin 4 to 1
or 7)
Tj =-40°C:
Tj =25°C:
Tj =+150°C:
Repetitive short circuit shutdown current limit
Tj = Tjt (see timing diagrams, page 11)
Output clamp (inductive load switch off)
at VOUT = Vbb - VON(CL)
IL= 40 mA:
Thermal overload trip temperature
Thermal hysteresis
Reverse battery (pin 4 to 2) 9)
Reverse battery voltage drop (Vout > Vbb)
IL = -1.9 A, each channel
Tj=150 °C:
Diagnostic Characteristics
Open load detection current
(included in standby current Ibb(off))
Open load detection voltage
9)
Values
min
typ
max
Unit
IL(SCp)
5.5
4.5
2.5
9.5
7.5
4.5
13
11
7
A
--
4
--
A
41
150
---
47
-10
--
53
--32
V
°C
K
V
-VON(rev)
--
610
--
mV
IL(off)
--
30
--
µA
2
3
4
V
IL(SCr)
VON(CL)
Tjt
∆Tjt
-Vbb
Tj=-40..150°C: VOUT(OL)
Requires 150 Ω resistor in GND connection. The reverse load current through the intrinsic drain-source
diode has to be limited by the connected load. Note that the power dissipation is higher compared to normal
operating conditions due to the voltage drop across the intrinsic drain-source diode. The temperature
protection is not active during reverse current operation! Input and Status currents have to be limited (see
max. ratings page 2 and circuit page 8).
Semiconductor Group
5
BTS 612 N1
Parameter and Conditions, each channel
Symbol
Values
min
typ
max
RI
2.5
3.5
6
kΩ
VIN(T+)
VIN(T-)
∆ VIN(T)
IIN(off)
1.7
1.5
-1
--0.5
--
3.5
--50
V
V
V
µA
On state input current (pin 3 or 6), VIN = 3.5 V,
Tj =-40..+150°C
IIN(on)
20
50
90
µA
Delay time for status with open load
td(ST OL3)
--
220
--
µs
Status output (open drain)
Zener limit voltage Tj =-40...+150°C, IST = +1.6 mA: VST(high)
Tj =-40...+25°C, IST = +1.6 mA: VST(low)
ST low voltage
Tj = +150°C, IST = +1.6 mA:
5.4
---
6.1
---
-0.4
0.6
V
at Tj = 25 °C, Vbb = 12 V unless otherwise specified
Input and Status Feedback10)
Input resistance
Tj=-40..150°C, see circuit page 8
Input turn-on threshold voltage
Tj =-40..+150°C:
Tj =-40..+150°C:
Input turn-off threshold voltage
Input threshold hysteresis
Off state input current (pin 3 or 6), VIN = 0.4 V,
Tj =-40..+150°C
Unit
after Input neg. slope (see diagram page 12)
10)
If a ground resistor RGND is used, add the voltage drop across this resistor.
Semiconductor Group
6
BTS 612 N1
Truth Table
Normal operation
Channel 1
Open load
Channel 2
Channel 1
Short circuit to Vbb
Channel 2
both channel
Overtemperature
Channel 1
Channel 2
Undervoltage/ Overvoltage
L = "Low" Level
H = "High" Level
IN1
IN2
OUT1
OUT2
L
L
H
H
L
L
H
L
H
X
L
L
H
L
H
X
L
X
H
L
H
X
X
X
L
H
L
H
L
H
X
L
L
H
L
H
X
L
L
H
L
H
X
X
X
L
H
X
L
L
H
H
Z
Z
H
L
H
X
H
H
H
L
H
X
L
L
L
L
L
X
X
L
L
H
L
H
L
H
X
Z
Z
H
L
H
X
H
H
H
L
L
L
X
X
L
L
L
ST
BTS611L1
H
H
H
H
H(L11))
H
L
H(L11))
H
L
L12)
H
H(L13))
L12)
H
H(L13))
H
L
L
H
L
H
L
H
ST
BTS612N1
H
H
H
H
L
H
H
L
H
H
L
H
H
L
H
H
H
L
L
H
L
H
L
H
X = don't care
Z = high impedance, potential depends on external circuit
Status signal after the time delay shown in the diagrams (see fig 5. page 12)
11)
With additional external pull up resistor
An external short of output to Vbb, in the off state, causes an internal current from output to ground. If R GND
is used, an offset voltage at the GND and ST pins will occur and the VST low signal may be errorious.
13) Low resistance to V may be detected in the ON-state by the no-load-detection
bb
12)
Semiconductor Group
7
BTS 612 N1
Inductive and overvoltage output clamp
Terms
+ V bb
V
bb
4
I IN1
3
V
Ibb
V
ON1
V
ON2
Vbb
IN1
OUT1
I IN2
6
OUT2
ST
V
V
IN1 IN2 V
5
ST
I L2
VOUT2
I
GND
PROFET
GND
V
OUT1
2
GND
OUT
7
GND
R
VON
I L1
1
PROFET
IN2
I ST
Z
VON clamped to 47 V typ.
Overvolt. and reverse batt. protection
+ V bb
Input circuit (ESD protection)
R
IN
IN1
I
V
RI
Z2
IN2
Logic
ESD-ZD I
I
R ST
I
ST
V
GND
Z1
GND
ESD zener diodes are not to be used as voltage clamp
at DC conditions. Operation in this mode may result in
a drift of the zener voltage (increase of up to 1 V).
R GND
Signal GND
VZ1 = 6.1 V typ., VZ2 = 47 V typ., RI= 3.5 kΩ typ,
RGND= 150 Ω
Status output
Open-load detection
+5V
OFF-state diagnostic condition: VOUT > 3 V typ.; IN low
R ST(ON)
GND
ST
ESDZD
OFF
ESD-Zener diode: 6.1 V typ., max 5 mA;
RST(ON) < 380 Ω at 1.6 mA, ESD zener diodes are not
to be used as voltage clamp at DC conditions.
Operation in this mode may result in a drift of the zener
voltage (increase of up to 1 V).
I
Logic
unit
L(OL)
Open load
detection
Signal GND
Semiconductor Group
8
V
OUT
BTS 612 N1
GND disconnect
V
Vbb disconnect with charged external
inductive load
4
bb
3
IN1
Ibb
4
Vbb
OUT1
6
IN2
5
OUT1
6
OUT2
5
V
V
IN1 IN2 ST
V
Due to VGND >0, no VST = low signal available.
GND
Inductive Load switch-off energy
dissipation
4
E bb
IN1
Vbb
IN2
PROFET
OUT1
IN1
6
IN2
5
OUT2
ST
bb
If other external inductive loads L are connected to the PROFET,
additional elements like D are necessary.
GND disconnect with GND pull up
V
1
E AS
7
IN
GND
PROFET
V
bb
V
ST
=
ELoad
V bb
2
V
D
7
2
Any kind of load. In case of Input=high is VOUT ≈ VIN - VIN(T+) .
V
ST
V
GND
3
1
PROFET
IN2
7
GND
2
V
Vbb
IN1
high
PROFET
OUT2
ST
3
1
OUT
ST
GND
EL
GND
ZL
Any kind of load. If VGND > VIN - VIN(T+) device stays off
Due to VGND >0, no VST = low signal available.
Vbb disconnect with energized inductive
load
{
L
RL
ER
Energy stored in load inductance:
2
EL = 1/2·L·I L
4
3
IN1
Vbb
IN2
PROFET
OUT1
high
6
OUT2
5
ST
While demagnetizing load inductance, the energy
dissipated in PROFET is
1
EAS= Ebb + EL - ER= ∫ VON(CL)·iL(t) dt,
with an approximate solution for RL > 0 Ω:
7
GND
2
V
EAS=
bb
Normal load current can be handled by the PROFET
itself.
Semiconductor Group
9
IL· L
IL·RL
·(V + |VOUT(CL)|)· ln (1+
)
|VOUT(CL)|
2·RL bb
BTS 612 N1
Maximum allowable load inductance for
a single switch off (both channels parallel)
Typ. transient thermal impedance chip case
ZthJC = f(tp), one Channel active
L = f (IL ); Tj,start = 150°C,TC = 150°C const.,
Vbb = 12 V, RL = 0 Ω
ZthJC [K/W]
10
L [mH]
1000
1
100
D=
0.5
0.2
0.1
0.05
0.02
0.01
0
0.1
10
0.01
1E-5
1E-4
1E-3
1E-2
1E-1
1E0
1E1
tp [s]
1
2
3
4
5
6
7
8
IL [A]
Transient thermal impedance chip case
ZthJC = f(tp), both Channel active
ZthJC [K/W]
10
1
D=
0.5
0.2
0.1
0.05
0.02
0.01
0
0.1
0.01
1E-5
1E-4
1E-3
1E-2
1E-1
1E0
1E1
tp [s]
Semiconductor Group
10
BTS 612 N1
Timing diagrams
Both channels are symmetric and consequently the diagrams
are valid for each channel as well as for permuted channels
Figure 1a: Vbb turn on:
Figure 2b: Switching an inductive load
IN1
IN2
IN
V bb
ST
V
OUT1
V
OUT
V
OUT2
I
L
ST open drain
t
t
Figure 2a: Switching a lamp:
Figure 3a: Short circuit
shut down by overtempertature, reset by cooling
IN
IN
other channel: normal operation
ST
IL
V
OUT
I L(SCp)
I
IL(SCr)
L
t
ST
t
Heating up may require several milliseconds, depending on
external conditions
Semiconductor Group
11
BTS 612 N1
Figure 4a: Overtemperature:
Reset if Tj <Tjt
Figure 6a: Undervoltage:
IN
IN
V
bb
ST
Vbb(u cp)
Vbb(u rst)
V
bb(under)
V
OUT
V OUT
T
ST open drain
J
t
t
Figure 6b: Undervoltage restart of charge pump
Figure 5a: Open load: detection in OFF-state, turn
on/off to open load
VON(CL)
V on
IN1
on-state
VOUT1
V
V
bb(u rst)
IL1
V
channel 1: open load
t
V
bb(over)
off-state
channel 2: normal operation
off-state
IN2
bb(o rst)
bb(u cp)
V bb(under)
V bb
d(ST OL3)
t d(ST OL3)
charge pump starts at Vbb(ucp) =5.6 V typ.
ST
t
td(ST,OL3) depends on external circuitry because of high
impedance
*) IL = 30 µA typ
Semiconductor Group
12
BTS 612 N1
Figure 7a: Overvoltage:
IN
Vbb
V ON(CL)
Vbb(over)
V bb(o rst)
V
OUT
ST
t
Semiconductor Group
13
BTS 612 N1
SMD TO 220AB/7, Opt. E3128 Ordering code
Package and Ordering Code
BTS612N1 E3128A T&R:
All dimensions in mm
Standard TO-220AB/7
BTS612N1
TO 220AB/7, Opt. E3230
BTS612N1 E3230
Q67060-S6303-A4
Ordering code
Q67060-S6303-A2
Changed since 04.96
Date Change
td(ST OL4) max reduced from 1500
Dec
1996 to 800µs, typical from 400 to
320µs, min limit unchanged
EAS maximum rating and diagram
and ZthJC diagram added
ESD capability increased
Typ. reverse battery voltage drop VON(rev) added
Ordering code
Q67060-S6303-A3
Components used in life-support devices or systems must be
expressly authorised for such purpose! Critical components14) of
the Semiconductor Group of Siemens AG, may only be used in life
supporting devices or systems15) with the express written approval
of the Semiconductor Group of Siemens AG.
14) A critical component is a component used in a life-support
device or system whose failure can reasonably be expected to
cause the failure of that life-support device or system, or to
affect its safety or effectiveness of that device or system.
15) Life support devices or systems are intended (a) to be
implanted in the human body or (b) support and/or maintain
and sustain and/or protect human life. If they fail, it is
reasonably to assume that the health of the user or other
persons may be endangered.
Semiconductor Group
14