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PDF RT8723 Data sheet ( Hoja de datos )
| Número de pieza | RT8723 | |
| Descripción | Single-Phase Full-Wave Fan Motor Driver | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT8723
Single-Phase Full-Wave Fan Motor Driver
General Description
The RT8723 is a single-phase driver IC for fan motors.
Rotation speed is controlled by supply voltage modulation
and PWM input signal. In the supply voltage control
application, the fan speed slope is adjustable by the
external voltage input. The RT8723 provides several
protection features including the standby mode, thermal
shutdown, lock protection, the over-current protection and
also the under-voltage protection. In standby and thermal
shutdown mode, supply current is less than 100μA. The
rotation frequency is generated by FG output.
Features
z Low Supply Current
z PWM Supply Voltage Control Fan Speed
z Adjustable Voltage Control Fan Speed
z Smart Force Start-Up Function
z Built-In Lock Protection
z Built-In Thermal Shutdown
z Built-In Over-Current Protection
z Built-In Frequency Generator with FG Output Signal
z Include Hall Bias Circuit
z RoHS Compliant and Halogen Free
Ordering Information
RT8723
Package Type
QU : UDFN-10L 3x3 (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
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.
Applications
z Single Phase Fan Motor for Notebook or PC
Marking Information
2M=YM
DNN
2M= : Product Code
YMDNN : Date Code
Simplified Application Circuit
Supply
Voltage
Optional
D1
D2
RT8723
VCC
OUT2
C1
PWM Control Signal
Pull-High Voltage
Floating
PWM
OUT1
RFG
FG
HB
SET H+
GND H-
Single Phase
Brushless M
DC Motor
Hall
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8723-03 October 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT8723
Parameter
Input-Output Gain
Input Offset Voltage
Input Hysteresis Voltage
Output Voltage
FG Pin Low Voltage
FG Pin Leak Current
Hall Bias Voltage
High-Level
SET Input Leakage
Low-Level
Lock Detection On-Time
Lock Detection Off-Time
Thermal Shutdown
Thermal Shutdown Hysteresis
Symbol
GIO
VHOFS
VHys
VOUT
VFG
IFG
VHB
IS ET_H
IS ET_L
TON
TOFF
Test Conditions
VOUT/H+ − H- (Ratio)
IOUT = 250mA
IFG = 5mA
VFG = VCC
IHB = −5mA
VSET = VCC, @ADJ Mode
VSET = 0V, @ADJ Mode
Supply Voltage Threshold
Quick Start
VCC_TH
Standby Detection Time
Quick Start Enable Time
tS D
tQS
Min Typ Max Unit
42 44.6 47 dB
-- -- ±6 mV
±5 ±10 ±15 mV
-- 0.2 0.4
--- 0.1 0.2
V
V
-- -- 1 μA
1.26 1.3 1.34 V
-- -- 1
μA
-- -- 1
0.35 0.5 0.65 s
3.5 5 6.5 s
-- 160 --
°C
-- 30 -- °C
3 3.5 4
V
0.7 1 1.3 ms
-- 30 -- μs
Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in
the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may
affect device reliability.
Note 2. θJA is measured at TA = 25°C on a high effective thermal conductivity one/two-layer test board per JEDEC 51-3. θJC is
measured at the exposed pad of the package.
Note 3. Devices are ESD sensitive. Handling precaution is recommended.
Note 4. The device is not guaranteed to function outside its operating conditions.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8723-03 October 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
Outline Dimension
RT8723
Symbol
A
A1
A3
b
D
D2
E
E2
e
L
21
21
DETAIL A
Pin #1 ID and Tie Bar Mark Options
Note : The configuration of the Pin #1 identifier is optional,
but must be located within the zone indicated.
Dimensions In Millimeters
Min.
Max.
0.500
0.600
0.000
0.050
0.100
0.175
0.180
0.300
2.950
3.050
2.350
2.450
2.950
3.050
1.600
1.700
0.500
0.350
0.450
Dimensions In Inches
Min.
Max.
0.020
0.024
0.000
0.002
0.004
0.007
0.007
0.012
0.116
0.120
0.093
0.096
0.116
0.120
0.063
0.067
0.020
0.014
0.018
U-Type 10L DFN 3x3 Package
Richtek Technology Corporation
14F, No. 8, Tai Yuen 1st Street, Chupei City
Hsinchu, Taiwan, R.O.C.
Tel: (8863)5526789
Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should
obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. Richtek cannot
assume responsibility for use of any circuitry other than circuitry entirely embodied in a Richtek product. Information furnished by Richtek is believed to be
accurate and reliable. However, no responsibility is assumed by Richtek or its subsidiaries for its use; nor for any infringements of patents or other rights of third
parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Richtek or its subsidiaries.
DS8723-03 October 2013
www.richtek.com
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet RT8723.PDF ] | |
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