BELLING BL8123 400ma bi-direction driver Datasheet

BL8123
400mA Bi-Direction Driver
DESCRIPTION
FEATURES
BL8123 is a bi-direction relay driver circuit, used
to control the magnetic latching relay, with large
output capability, ultra-low power consumption.
It can be widely used in smart meters and other
pulses, level control applications.



BL8123 can provide 400mA typical driving current,
which will different according to the relay coil
resistance. The input High Level Threshold of
BL8123 is 1.5V; it can compatible with most single
chip microcontroller.



BL8123 is available in SOT-23-6 package.

1.8 to 5.5V input voltage range
Low Power Consumption (IQ<1uA)
Input High Level Threshold: 1.5V, compatible
with most single chip microcontroller
Typical Driving Current: 300mA
Rds(on)=12ohm(Vin=3V, PMOSFET+NMOSFET)
Peak Driving Current: 400mA@Vin=5V
Environment Temperature: -40C~85C
SOT-23-6 package

APPLICATIONS
Smart Meter
TYPICAL APPLICATION
6
1
2 LC5258
BL8123 5
A
3
4
+
B
-
Motor
PIN OUT & MARKING
ORDERING INFORMATION
Part No.
Package
Tape & Reel
BL8123CB6TR
SOT-23-6
3000/Reel
B
VIN
OA
6
5
4
RU: Product Code
YW: Date code
RUYW
1
2
3
OB
GND
A
SOT23-6
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1
BL8123
ABSOLUTE MAXIMUM RATING
Parameter
Value
Max Operating Junction Temperature(Tj)
Ambient Temperature(Ta)
150C
-40C – 125C
θja
190C / W
Package Thermal Resistance
SOT23-6
θjc
110C / W
Storage Temperature(Ts)
-40C - 150C
Lead Temperature & Time
260C, 10S
Note: Exceed these limits to damage to the device. Exposure to absolute maximum rating conditions may affect device
reliability.
RECOMMENDED WORK CONDITIONS
Parameter
Value
Input Voltage Range
Operating Junction Temperature(Tj)
2.0-5V
-40C –85C
ELECTRICAL CHARACTERISTICS
(VIN=5V, TA=25C)
Symbol
VIN
Iq
Parameter
Conditions
Input Voltage Range
Quiescent Current
Min
Typ
1.8
Rdson
Switch Rdson
VTH
RIN
VSD
TR
TD(ON)
TF
TDIOFF)
ON Input High Voltage
Equivalent Input Resistor
Fly-Wheel Diode Forward Voltage
Rise Time
Turn ON Delay Time
Fall Time
Turn OFF Delay Time
Vin=3V, RL=75ohm
Vin=5V, RL=75ohm
Vin=3V
12
10
1.5
500
0.8
40
60
30
70
Is=1A
VIN=3V, RL=75ohm
VIN=3V, RL=75ohm
VIN=3V, RL=75ohm
VIN=3V, RL=75ohm
Max
Unit
5.5
1
15
15
V
uA
ohm
ohm
V
Kohm
V
ns
ns
ns
ns
1.5
LOGIC FUNCTION TABLE
Input A
Input B
Output OA
Output OB
RELAY RESPONSE
1
0
0
1
0
1
0
1
1
0
High-impedance
High-impedance
0
1
High-impedance
High-impedance
ON
OFF
Hold
Hold
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2
BL8123
PIN DESCRIPTION
NAME
PIN #
1
2
3
4
5
6
OB
GND
A
OA
VIN
B
DESCRIPTION
Output B
Ground.
Input A
Output A
Supply input voltage
Input B
ELECTRICAL PERFORMANCE
Tested under TA=25C, unless otherwise specified
Turn on delay and rise time
Turn off delay and fall time
Ch1---Input Ch2---Output
Ch1---Input Ch2---Output
Vth VS. Vin
Forward Voltage
2.5
1400
1200
2.0
Vth(V)
I(mA)
1000
800
600
1.5
1.0
400
0.5
200
0.0
0
0.0
0.5
1.0
1.5
0
2.0
10
Vin(V)
VSD(V)
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5
3
15
20
BL8123
BLOCK DIAGRAM
DETAILED DESCRIPTION
Pulse Triggering
If input is driven by square pulse, connect the inputs to the pulse source directly. Relay will operate as logic table
stated (Vin should be less than the power supply voltage.
The recommended pulse width=100ms. The length of the intervals should be longer than 100ms. These intervals
include: intervals between forward drive pulse and next backward drive pulse, intervals between forward drive pulse
and next forward drive pulse, intervals between backward drive pulse and next forward drive pulse, intervals between
backward drive pulse and next backward drive pulse.
Forward drive/OPEN
InputA
Backward drive/CLOSE
interval
Pulse width
=100ms
InputB
Pulse width
Interval
=100ms
Forward drive/OPEN
InputA
Pulse width
=100ms
interval
Forward drive/OPEN
Pulse width
=100ms
InputB
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4
interval
BL8123
6
1
2 LC5258
BL8123 5
A
3
4
B
+
-
Motor
Pulse triggering application diagram
Relay free-wheel
Relay from ON to OFF, the energy stored in the relay inductor released by the chip’s internal body diode and the relay
inductor. Until the end of the release of this energy, relay proceeding to the next operation.
PACKAGE OUTLINE
Package
SOT23-6
Devices per reel
Package specification：
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5
3000
Unit
mm