am4951 BCD Semiconductor Manufacturing Limited, am4951 Datasheet

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am4951

Manufacturer Part Number
am4951
Description
Btl Drive Single-phase Full-wave Fan Motor Driver
Manufacturer
BCD Semiconductor Manufacturing Limited
Datasheet

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am4951MMTR-G1
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am4951RMMTR-G1
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General Description
The AM4951/R/2 series is a single-phase BTL output
fan motor driver designed by bipolar process. This IC
features high efficiency, silent operation and includes
lock shutdown and automatic restart functions. When
the motor is under lock condition, the lock
shutdown function turns off the output current. When
the
restart automatically and allow DC fan to run. It is
applied for high reliability and low noise application,
such as personal computers, notebook, car audio,
CPU cooling systems and power supplies in
consumer electronics systems.
The AM4951/R series is available in MSOP-8 (12V
application only) or PSOP-8 (24V application only)
package. The AM4952 is available in MSOP-10
package.
Mar. 2010 Rev. 1. 0
BTL Drive Single-phase Full-wave Fan Motor Driver
lock condition
MSOP-8
is
removed,
Figure 1. Package Types of AM4951/R/2
the
IC
will
PSOP-8
1
Features
Applications
BTL Output Single-phase Full-wave Linear
Low Saturation Output (High Side and Low Side
Built-in Lock Protection and Automatic Restart
Built-in FG/RD Output
Thermal Protection Circuit
Notebook, Personal Computers
CPU Cooling Systems
Drive (Gain Resistor=1k to 360kΩ, Gain=51dB)
Usable Voltage Range (2.2V to 24V)
V
Audio and Office Peripherals
Support Low-voltage Drive and Feature a Wide
Built-in Hall Sensor Bias (AM4952 Only,
Small-sized, High Thermal Capacity Package
Power Supplies in Consumer Electronics, Car
Saturation Voltage): V
I
Circuits
FG Output (AM4951), RD Output (AM4951R),
FG and RD Output (AM4952)
OUT
HB
=1.5V)
=250mA)
BCD Semiconductor Manufacturing Limited
Preliminary Datasheet
MSOP-10
SAT_TOTAL
AM4951/R/2
=1.2V (typical,

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am4951 Summary of contents

Page 1

... BTL Drive Single-phase Full-wave Fan Motor Driver General Description The AM4951/R/2 series is a single-phase BTL output fan motor driver designed by bipolar process. This IC features high efficiency, silent operation and includes lock shutdown and automatic restart functions. When the motor is under lock condition, the lock shutdown function turns off the output current ...

Page 2

... BTL Drive Single-phase Full-wave Fan Motor Driver Pin Configuration MM Package (MSOP-8) For AM4951/R 12V Application MM Package (MSOP-10) For AM4952 Figure 2. Pin Configuration of AM4951/R/2 (Top View) Mar. 2010 Rev Preliminary Datasheet MP Package (PSOP-8) For AM4951/R 24V Application BCD Semiconductor Manufacturing Limited 2 ...

Page 3

... BTL Drive Single-phase Full-wave Fan Motor Driver Functional Block Diagram (2) HB 1.5V REG 1 (1) IN+ IN- 2 (3) 5 (6) GND A (B) A for AM4951/R B for AM4952 Figure 3. Functional Block Diagram of AM4951/R/2 Mar. 2010 Rev VCC 7 (8) OUT1 4 (5) OUT2 6 (7) Control Circuit Charge Discharge Discharge Pulse 3 (4) CT ...

Page 4

... BTL Drive Single-phase Full-wave Fan Motor Driver Ordering Information Circuit Type 1: AM4951 1R: AM4951R 2: AM4952 Package MM: MSOP-8 MSOP-10 MP: PSOP-8 Temperature Package Range MSOP-8 -40 to 105°C PSOP-8 MSOP-10 BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green ...

Page 5

... OUT MSOP-8 P PSOP-8 D MSOP-10 T -40 to 125 OP T -55 to 150 STG Symbol Min V 2 ICM T -40 A BCD Semiconductor Manufacturing Limited 5 AM4951/R/2 Unit 585 mW 960 mW 585 mW ºC ºC Max Unit -1 105 ºC ...

Page 6

... OUT Low Saturation Voltage OUT High Saturation Voltage Hall Input Sensitivity FG Low Level Voltage (For AM4951/2) FG Leakage Current (For AM4951/2) RD Low Level Voltage (For AM4951R/2) RD Leakage Current (For AM4951R/2) HB Voltage (For AM4952) Mar. 2010 Rev Preliminary Datasheet Symbol Conditions ...

Page 7

... Figure 5. Supply Current vs. Ambient Temperature 800 o =25 C 700 A 600 500 400 300 200 100 0 300 350 400 -50 -25 Figure 7. Power Dissipation vs. Ambient Temperature 7 Preliminary Datasheet AM4951/R/2 V =12V =L) CC1 =H) CC2 100 Package: MSOP-8 ...

Page 8

... BTL Drive Single-phase Full-wave Fan Motor Driver Typical Performance Characteristics (Continued) 1200 1050 900 750 600 450 300 150 0 -50 - Figure 8. Power Dissipation vs. Ambient Temperature Mar. 2010 Rev Package: PSOP-8 75 100 125 150 8 Preliminary Datasheet AM4951/R/2 BCD Semiconductor Manufacturing Limited ...

Page 9

... Note 5: If the line between Hall sensor output and Hall sensor input long, the noise may occur in this line. But it can be eliminated by adding a capacitor C3. Note 6: Each of R2, R3, R4 and R5 (AM4951/R only) is recommended to be 51kΩ typical recommended and must be added when V Note 7: The package of AH920 is SOT-23- packaged in TO-92S-3, ...

Page 10

... Mar. 2010 Rev IN VCC IN- AM4952 CT OUT2 C2 GND OUT1 L *Note IN- AM4952 AH920 IN Figure 10. Typical Application of AM4952 10 Preliminary Datasheet AM4951/R VCC RD FG OUT1 L OUT2 GND BCD Semiconductor Manufacturing Limited ...

Page 11

... BTL Drive Single-phase Full-wave Fan Motor Driver Mechanical Dimensions Mar. 2010 Rev Preliminary Datasheet MSOP-8 BCD Semiconductor Manufacturing Limited 11 AM4951/R/2 Unit: mm(inch) ...

Page 12

... BTL Drive Single-phase Full-wave Fan Motor Driver Mechanical Dimensions (Continued) Mar. 2010 Rev Preliminary Datasheet PSOP-8 BCD Semiconductor Manufacturing Limited 12 AM4951/R/2 Unit: mm(inch) ...

Page 13

... BTL Drive Single-phase Full-wave Fan Motor Driver Mechanical Dimensions (Continued) 0.180(0.007) 0.280(0.011) 2.900(0.114) 3.100(0.122) Note: Eject hole, oriented hole and mold mark is optional. Mar. 2010 Rev MSOP-10 0.500(0.020) TYP BCD Semiconductor Manufacturing Limited 13 Preliminary Datasheet AM4951/R/2 Unit: mm(inch) ...

Page 14

... BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. ...

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