BL8123 BELLING | Alldatasheet
Document overview
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Technical content
www.belling.com.cn 1 400mA Bi-Direction Driver BL8123
DESCRIPTION
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.
FEATURES
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: -40C~85C SOT-23-6 package
APPLICATIONS
Smart Meter TYPICAL APPLICATION
ORDERING INFORMATION
Part No. Package Tape & Reel BL8123CB6TR SOT-23-6 3000/Reel PIN OUT & MARKING SOT23-6 B A OA GND VIN RUYW OB 2 3 6 5 4 RU: Product Code YW: Date code Motor A B LC5258 3 4 BL8123
www.belling.com.cn 2 BL8123 ABSOLUTE MAXIMUM RATING Parameter Value Max Operating Junction Temperature(Tj) 150C Ambient Temperature(Ta) -40C – 125C θjc 110C / W Storage Temperature(Ts) -40C - 150C Lead Temperature & Time 260C, 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 2.0-5V Operating Junction Temperature(Tj) -40C –85C
ELECTRICAL CHARACTERISTICS
(VIN=5V, TA=25C) Symbol Parameter Conditions Min Typ Max Unit VIN Input Voltage Range 1.8 5.5 V Iq Quiescent Current 1 uA Rdson Switch Rdson Vin=3V, RL=75ohm 12 15 ohm Vin=5V, RL=75ohm 10 15 ohm VTH ON Input High Voltage Vin=3V 1.5 V RIN Equivalent Input Resistor 500 Kohm VSD Fly-Wheel Diode Forward Voltage Is=1A 0.8 1.5 V TR Rise Time VIN=3V, RL=75ohm 40 ns TD(ON) Turn ON Delay Time VIN=3V, RL=75ohm 60 ns TF Fall Time VIN=3V, RL=75ohm 30 ns TDIOFF) Turn OFF Delay Time VIN=3V, RL=75ohm 70 ns LOGIC FUNCTION TABLE Input A Input B Output OA Output OB RELAY RESPONSE 1 0 1 0 ON 0 1 0 1 OFF 0 0 High-impedance High-impedance Hold 1 1 High-impedance High-impedance Hold
www.belling.com.cn 3 BL8123 PIN DESCRIPTION NAME PIN # DESCRIPTION OB 1 Output B GND 2 Ground. A 3 Input A OA 4 Output A VIN 5 Supply input voltage B 6 Input B ELECTRICAL PERFORMANCE Tested under TA=25C, unless otherwise specified Turn on delay and rise time Turn off delay and fall time Ch1---Input Ch2---Output Ch1---Input Ch2---Output 200 400 600 800 1000 1200 1400 I(mA) VSD(V) Forward Voltage 0.0 0.5 1.0 1.5 2.0 2.5 0 5 10 15 20 Vth(V) Vin(V) Vth VS. Vin
www.belling.com.cn 4 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 f orward 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. InputA InputB Pulse width =100ms Pulse width =100ms Interval interval Forward drive/OPEN Backward drive/CLOSE InputA InputB Pulse width =100ms interval Forward drive/OPEN Forward drive/OPEN Pulse width =100ms interval
www.belling.com.cn 5 BL8123 Motor A B LC5258 3 4 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 specification： BL8123