LB1861 Sanyo Semiconductor Corporation, LB1861 Datasheet

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LB1861

Manufacturer Part Number
LB1861
Description
Variable speed fan motor driver
Manufacturer
Sanyo Semiconductor Corporation
Datasheet

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Ordering number: EN3519A
Overview
The LB1860 series ICs are drivers for two-phase unipolar drive
DC brushless fan motors. They have functions such as driving,
lock protection, restart and speed control.
Features and Functions
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Two-speed mode select function requiring less external
component additions: Full speed and Low speed. Or,
thermistor-controlled continuous variable-speed function
according to ambient operation temperatures.
Motor lock protection and automatic return circuit built in
Output transistors: Output current I
Built-in thermal shutdown circuit
Built-in rotation detect function
(Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)
The LB1860 series can be operated from either 12 V or 24 V
power supply by changing an external resistor.
(Strong protection against power supply surge)
Connectable direct to a Hall element
protection Zener diodes (LB1860: M-Vz = 57 V/ LB1861:
M-Vz = 32 V)
Motor starts rotating at a low speed.
Enables low-level noise protection with chip capacitor.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
O
= 1.5 A, output circuit
Package Dimensions
unit: mm
3098B-DIP10S
unit: mm
3111-MFP14S
Variable Speed Fan Motor Driver
LB1860,1860M,1861,1861M
[LB1860M, 1861M]
[LB1860, 1861]
73096HA(II)/4060TA,TS No.3519-1/6
Monolithic Digital IC
SANYO : DIP10S
SANYO : MFP14S

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LB1861 Summary of contents

Page 1

... Motor starts rotating at a low speed. Motor lock protection and automatic return circuit built in . Output transistors: Output current I protection Zener diodes (LB1860: M- LB1861: M- Enables low-level noise protection with chip capacitor. . Built-in thermal shutdown circuit . Built-in rotation detect function (Drive mode: ‘ ...

Page 2

... Specifications Absolute Maximum Ratings ° LB1860M, LB1861M Parameter Maximum input current Output supply voltage Output current RD flow-in current RD supply voltage Allowable power dissipation Operating temperature Storage temperature Allowable Operating Ranges ° C Parameter Input current range Common-mode input voltage range Electrical Characteristics ° ...

Page 3

Block Diagram and Application Circuit Constant current circuit 0. µ Truth Table ( ): LB1860M, 1861M + – Rt1 (H) (L) — — (L) (H) — — ...

Page 4

... 1.5 A max O V sat = 1.15 V/1.0 A typ typ (LB1860, 1860M) OLM typ (LB1861,1861M) OLM Lock detect time Lock protect time (output ON) (output OFF) Output OFF Output Output OFF ON Automatic Return Circuit C Pin Voltage /t ’ duty becomes off o pin within the IN Approximately 2 sec ...

Page 5

When a fan is rotating, the capacitor is charged at 4 µA (typ) and discharged through the C with pulses according to the rotational speed. 2 When a fan is locked, no discharge occurs through the C and the ...

Page 6

No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property ...

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