LB11961(2016) データシートの表示（PDF） - ON Semiconductor
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LB11961 Datasheet PDF : 8 Pages
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LB11961
Single-Phase Full-Wave
Fan Motor Driver
Overview
The LB11961 is a single-phase bipolar drive motor driver that easily
implements direct PWM motor drive systems with excellent efficiency. The
LB11961 is optimal for fan motor drive in personal computer power supply
systems and CPU cooling fan systems.
Features
• Single-phase full-wave drive (16V, 1.0A transistors are built in)
• Built-in variable speed function controlled by a thermistor input
The LB11961 can implement quiet, low-vibration variable speed control
using externally clocked high side transistor direct PWM drive.
• Built-in regenerative diode (Di); only requires a minimal number of external
components.
• Built-in HB
• Minimum speed setting pin (allows full-speed mode operation at startup)
• Operates in full-speed mode when the thermistor is removed.
• Built-in lock protection and automatic recovery circuits
• FG (speed detection) and RD (lock detection) outputs
• Built-in thermal shutdown circuit
Applications
• Personal computer power supply systems
• CPU cooling fan systems
Specifications
Absolute Maximum Ratings at Ta = 25C (Note1)
Parameter
VCC maximum output voltage
OUT pin maximum output current
OUT pin output voltage
HB maximum output current
VTH input pin voltage
RD/FG output pin output voltage
RD/FG output current
Allowable power dissipation
Symbol
VCC max
IOUT max
VOUT max
IHB max
VTH max
VRD/FG
max
IRD/FG
Pd max
Conditions
When mounted
on a circuit
board (Note2)
Ratings
Unit
18 V
1.0 A
18 V
10 mA
6V
18 V
10 mA
W
1.1
Operating temperature
Topr
-30 to +90 C
Storage temperature
Tstg
-55 to +150 C
1. Stresses exceeding those listed in the Maximum Rating table may damage the device. If any of
these limits are exceeded, device functionality should not be assumed, damage may occur and
reliability may be affected.
2. Specified circuit board : 114.3 76.1 1.6mm3, glass epoxy.
www.onsemi.com
HSSOP14 (225mil)
XXXXXXXXXX
YMDDD
XXXXX = Specific Device Code
Y = Year
M = Month
DDD = Additional Traceability Data
ORDERING INFORMATION
See detailed ordering and shipping
information on page 8 of this data
sheet.
© Semiconductor Components Industries, LLC, 2016
1
November 2016- Rev. 1
Publication Order Number:
LB11961/D
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