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BL8023F
300mA Bi-Direction Relay Driver
DESCRIPTION
FEATURES
BL8023F 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.




BL8023F can provide 300mA typical driving
current, which will different according to the
relay coil resistance. The input High Level
Threshold of BL8023F is 2V; it can compatible
with most single chip microcontroller.
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

5 to 36V input voltage range
Low Power Consumption (IQ<1uA)
Input High Level Threshold: 2V, compatible with
most single chip microcontroller
Typical Driving Current: 300mA
Rds(on)=12ohm(Vin=12V, PMOSFET+NMOSFET)
Rds(on)=10ohm(Vin=30V, PMOSFET+NMOSFET)
Peak Driving Current: 500mA@Vin=24V
Environment Temperature: -40C~85C
SOT-23-6 packages
APPLICATIONS
BL8023F is available in SOT-23-6 packages.

Smart Meter
TYPICAL APPLICATION
L
220V
AC
N
AC
V+
AC
V-
+
BRIDGE
6
1
2 LC5223 5
BL8023F
A
3
Rs
4
B
Relay
ORDERING INFORMATION
Part No.
BL8023FCB6TR
Package
SOT-23-6
PIN OUT & MARKING
Tape & Reel
3000/Reel
B
VIN
OA
6
5
4
RYYW
1
2
3
OB
GND
A
SOT23-6
RY: Product Code
YW: Date code
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1
BL8023F
ABSOLUTE MAXIMUM RATING
Parameter
Value
Max Input Voltage
Max Operating Junction Temperature(Tj)
Ambient Temperature(Ta)
40V
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)
Max.36V
-40C –85C
ELECTRICAL CHARACTERISTICS
(VIN=5V, TA=25C)
Symbol
Parameter
VIN
Iq
Conditions
Min
Input Voltage Range
Quiescent Current
Rdson
5
Switch Rdson
VTH
RIN
ON Input High Voltage
Equivalent Input Resistor
Fly-Wheel Diode Forward
Voltage
Rise Time
Turn ON Delay Time
Fall Time
Turn OFF Delay Time
VSD
TR
TD(ON)
TF
TDIOFF)
Typ
Vin=12V, RL=75ohm
Vin=30V, RL=75ohm
Vin=12V, RL=40ohm
Vin=30V, RL=40ohm
Vin=12V
12
10
12
10
2
500
Is=1A
0.8
VIN=12V, RL=75ohm
VIN=12V, RL=75ohm
VIN=12V, RL=75ohm
VIN=12V, RL=75ohm
40
60
30
70
Max
Unit
36
1
18
16
20
16
V
uA
ohm
ohm
ohm
ohm
V
Kohm
1.5
V
ns
ns
ns
ns
Note: 1) This condition is not suitable for SOT23-6 package.
2) Input rise/fall time must less than 1ms, otherwise maybe destroy the chip.
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
BL8023F
PIN DESCRIPTION
PIN #
NAME
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
3.0
900
800
2.5
2.0
600
Vth(V)
I(mA)
700
500
400
1.5
1.0
300
200
0.5
100
0.0
0
0.0
0.5
1.0
1.5
0
2.0
10
15
20
Vin(V)
VSD(V)
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5
3
25
30
35
40
BL8023F
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, Rs is current-limiting resistor, it can be ignored in the voltage
is below 20V, i.e. Rs=0).
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
BL8023F
L
220V
AC
N
AC
V+
AC
V-
+
BRIDGE
6
1
Rs
2 LC5223 5
BL8023F
A
3
4
B
Relay
Pulse triggering application diagram
Level Triggering
If input is driven by voltage level, resistor R1, R2 should be used to insure low voltage standby input. Apply input
voltage according to logic table drives the relay correspondingly (R1, R2=30K-100K, R3, R4=100K, C1, C2=10n,
recommended for removing input spikes; Vin should be less than the power supply voltage, Rs is current-limiting
resistor, it can be ignored in the voltage is below 20V, i.e. Rs=0).
L
220V
AC
N
AC
V+
AC
V-
+
BRIDGE
A
Vin
R1
R3
B
6
1
2 BL8023F
LC5223 5
3
Rs
Vin
R4
4
R2
C1
Relay
Level 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.
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5
BL8023F
PACKAGE OUTLINE
Package
SOT23-6
Devices per reel
Package specification：
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6
3000
Unit
mm