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Richtek - Single-Phase BLDC Fan Driver IC

Numéro de référence RT8725
Description Single-Phase BLDC Fan Driver IC
Fabricant Richtek 
Logo Richtek 





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RT8725 fiche technique
®
RT8725
Single-Phase BLDC Fan Driver IC
General Description
The RT8725 is a single-phase driver IC for fan motors.
Rotation speed is controlled by PWM input signal. The
RT8725 provides several protection features including
standby mode, thermal shutdown, lock protection, over-
current protection and under-voltage protection. The Built-
in smart force start-up function overcomes and avoids
wrong status when electrical noise occurs during start-
up. In the standby and thermal shutdown mode, the supply
current is less than 100μA. The rotation frequency is
generated by FG output.
Ordering Information
RT8725
Package Type
QU : UDFN-8L 2x3 (U-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
Features
z Low Supply Current
z Smart Force Start-up Function
z PWM Supply Voltage Control Fan Speed
z Built-in Motor Lock Protection and Automatic
Restart
z Built-in Thermal Shutdown
z Built-in Over-Current Protection
z Built-in Frequency Generator with FG Output Signal
z RoHS Compliant and Halogen Free
Applications
z Single Phase Fan Motor for Notebook or PC
Pin Configurations
(TOP VIEW)
OUT2
VCC
H+
H-
1
2
3
4
8 GND
7 OUT1
6 PWM
9 5 FG
UDFN-8L 2x3
Marking Information
0A : Product Code
0AW
W : Date Code
Simplified Application Circuit
Optional
Supply D1
Voltage
D2
Hall
RT8725
VCC OUT2
C1
H+
H- OUT1
FG
Single-Phase
Brushless M
DC Motor
RFG
Pull-High Voltage
PWM Control Signal
PWM
GND
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8725-02 October 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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