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Technical content

Features

  • BTL Output Single-phase Full-wave Linear Drive (Gain Resistor=1k to 360kΩ, Gain=51dB)
  • Support Low-voltage Drive and Feature a Wide Usable V oltage Range (2.2V to 24V)
  • Low Saturation Output (High Side and Low Side Saturation V oltage): V SAT_TOTAL=1.2V (typical, IOUT=200mA)
  • Built-in Lock Protection and Automatic Restart Circuits
  • Built-in FG/RD Output
  • Built-in Hall Sensor Bias (AM4952 Only, V HB=1.5V)
  • Thermal Protection Circuit
  • Small-sized, High Thermal Capacity Package
  • FG Output (AM4951), RD Output (AM4951R), FG and RD Output (AM4952)

Applications

  • Notebook, Personal Computers
  • Power Supplies in Consumer Electronics, Car Audio and Office Peripherals
  • CPU Cooling Systems M S O P - 8 P S O P - 8 M S O P - 1 0

Figure 1. Package Types of AM4951/R/2

Figure 2. Pin Configuration of AM4951/R/2 (Top View)

Figure 3. Functional Block Diagram of AM4951/R/2

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited TR: Tape & Reel Blank: Tube

Ordering Information

Signal Part Number Marking ID Packing Type MSOP-8 -40 to 105°C FG AM4951MM-G1 4951MM-G1 Tube AM4951MMTR-G1 4951MM-G1 Tape & Reel RD AM4951RMM-G1 4951RMM-G1 Tube AM4951RMMTR-G1 4951RMM-G1 Tape & Reel PSOP-8 FG AM4951MP-G1 4951MP-G1 Tube AM4951MPTR-G1 4951MP-G1 Tape & Reel RD AM4951RMP-G1 4951RMP-G1 Tube AM4951RMPTR-G1 4951RMP-G1 Tape & Reel MSOP-10 FG & RD AM4952MM-G1 4952MM-G1 Tube AM4952MMTR-G1 4952MM-G1 Tape & Reel BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. G1: Green Package MM: MSOP-8 M S O P - 1 0 MP: PSOP-8 1: AM4951 1R: AM4951R 2: AM4952

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Absolute Maximum Ratings (Note 1, TA=25ºC) Parameter Symbol Value Unit Supply V oltage V CC 28 V Peak Output Current I OUT 500 mA FG/RD Pull-up V oltage V FG/VRD 28 V FG/RD Output Current I FG/IRD 10 mA Thermal Resistance (Junction to Ambient) θJA MSOP-8 205 °C/W PSOP-8 110 MSOP-10 195 Thermal Resistance (Junction to Case) θJC MSOP-8 48 °C/W PSOP-8 36 MSOP-10 46 Power Dissipation P D MSOP-8 585 mW PSOP-8 960 mW MSOP-10 585 mW Operating Temperature T OP -40 to 125 ºC Storage Temperature T STG -55 to 150 ºC Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional op eration of the device at these or any other conditions beyond those indicated under “Recommended Operating Co nditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply V oltage V CC 2.2 24 V Hall Input V oltage V ICM 0 V CC-1.5 V Operating Ambient Temperature T A -40 105 ºC

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

Electrical Characteristics

VCC=12V, TA=25oC, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit Supply Current ICC1 V CT=L 3 6 9 mA ICC2 V CT=H 2.5 5 7.5 mA CT Charge Current I CHG 0.9 1.3 1.5 µA CT Discharge Current I DHG 0.1 0.15 0.25 µA CT Charge/Discharge Current Ratio RCT I CHG / IDHG 6 8 10 CT Clamp V oltage V CL 1.3 1.5 1.7 V CT Comparator V oltage V CP 0.3 0.5 0.7 V OUT Low Saturation V oltage V SAT_L I OUT=200mA 0.25 0.45 V OUT High Saturation V oltage V SAT_H I OUT=200mA 0.95 1.2 V Hall Input Sensitivity V HN 7 15 mV FG Low Level V oltage (For AM4951/2) VFG I FG=5mA 0.15 0.3 V FG Leakage Current (For AM4951/2) IFGL V FG=15V 1 30 µA RD Low Level V oltage (For AM4951R/2) VRD I RD=5mA 0.15 0.3 V RD Leakage Current (For AM4951R/2) IRDL V RD=15V 1 30 µA HB V oltage (For AM4952) VHB I HB=1mA 1.35 1.5 1.65 V

Figure 8. Power Dissipation vs. Ambient Temperature

power supply line, C1 will also be necessary to improve reliability. Its capacity should be larger than 2.2µF. the value of R1 and R2 may achieve better startup characteristics and efficiency, even quiet operation. Note 4: This pin must be left open if unused. Note 5: If the line between Hall sensor output and Hall sensor input of IC is long, the noise may occur in this line. But it can be eliminated by adding a capacitor C3. Note 7: The package of AH920 is SOT-23-3. If it is packaged in TO-92S-3，please exchange IN- with IN+. Figure 9. Typical Application of AM4951/R

Figure 10. Typical Application of AM4952

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Mechanical Dimensions M S O P - 8 U n i t : m m ( i n c h )

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Mechanical Dimensions (Continued) P S O P - 8 U n i t : m m ( i n c h ) 3.202(0.126) 3.402(0.134)

BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Mechanical Dimensions (Continued) MSOP-10 Unit: mm(inch) 0.400(0.016) 0.800(0.031) 3.100(0.122) 2.900(0.114) 0.820(0.032) 1.100(0.043) 0.090(0.004) 0.230(0.009) 0.750(0.030) 0.950(0.037) 4.750(0.187) 5.050(0.199) 0.280(0.011) 0.180(0.007) 0.500(0.020) TYP 3.100(0.122) 2.900(0.114) 0.020(0.001) 0.150(0.006) Note: Eject hole, oriented hole and mold mark is optional.

BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use 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. - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 BCD Semiconductor Manufacturing Limited MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com BCD Semiconductor Manufacturing Limited IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use 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. - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.

800 Yi Shan Road, Shanghai 200233, China

Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office Unit A Room 1203, Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District, Shenzhen, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corp. 30920 Huntwood Ave. Hayward, CA 94544, USA Tel : +1-510-324-2988 Fax: +1-510-324-2788 - Headquarters BCD Semiconductor Manufacturing Limited No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, China Tel: +86-21-24162266, Fax: +86-21-24162277 IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifi- cations herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use 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. - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd.

800 Yishan Road, Shanghai 200233, China

Tel: +021-6485-1491, Fax: +86-021-5450-0008 MAIN SITE REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd., Shenzhen Office Unit A Room 1203,Skyworth Bldg., Gaoxin Ave.1.S., Nanshan District Shenzhen 518057, China Tel: +86-0755-8660-4900, Fax: +86-0755-8660-4958 Taiwan Office (Taipei) BCD Semiconductor (Taiwan) Company Limited Tel: +886-2-2656 2808 Fax: +886-2-2656-2806/26562950 Taiwan Office (Hsinchu) BCD Semiconductor (Taiwan) Company Limited 8F, No.176, Sec. 2, Gong-Dao 5th Road, East District HsinChu City 300, Taiwan, R.O.C Tel: +886-3-5160181, Fax: +886-3-5160181 - Headquarters BCD (Shanghai) Micro-electronics Limited No. 1600, Zi Xing Road, Shanghai ZiZhu Science-based Industrial Park, 200241, P. R.C. Tel: +86-021-2416-2266, Fax: +86-021-2416-2277 USA Office BCD Semiconductor Corp.

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