Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver General Description Features 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 lock condition is removed, the IC will 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. AM4951/R/2 BTL Output Single-phase Full-wave Linear Drive (Gain Resistor=1k to 360kΩ, Gain=51dB) Support Low-voltage Drive and Feature a Wide Usable Voltage Range (2.2V to 24V) Low Saturation Output (High Side and Low Side Saturation Voltage): VSAT_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, VHB=1.5V) Thermal Protection Circuit Small-sized, High Thermal Capacity Package FG Output (AM4951), RD Output (AM4951R), FG and RD Output (AM4952) Applications • • • MSOP-8 Notebook, Personal Computers Power Supplies in Consumer Electronics, Car Audio and Office Peripherals CPU Cooling Systems PSOP-8 MSOP-10 Figure 1. Package Types of AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 1 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Pin Configuration MM Package (MSOP-8) MP Package (PSOP-8) For AM4951/R 12V Application For AM4951/R 24V Application MM Package (MSOP-10) For AM4952 Figure 2. Pin Configuration of AM4951/R/2 (Top View) Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 2 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Functional Block Diagram VCC 7 (8) HB (2) 1.5V REG 1 (1) IN+ 4 (5) OUT1 OUT2 6 (7) IN2 (3) GND 5 (6) 8 (9) FG Control Circuit Charge Discharge 8 (10) RD Discharge Pulse 3 (4) CT A (B) A for AM4951/R B for AM4952 Figure 3. Functional Block Diagram of AM4951/R/2 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 3 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Ordering Information AM495 - Circuit Type G1: Green 1: AM4951 1R: AM4951R 2: AM4952 TR: Tape & Reel Blank: Tube Package MM: MSOP-8 MSOP-10 MP: PSOP-8 Package Temperature Range Output Signal FG MSOP-8 RD -40 to 105°C FG PSOP-8 RD MSOP-10 FG & RD Part Number Marking ID Packing Type AM4951MM-G1 4951MM-G1 Tube Tape & Reel AM4951MMTR-G1 4951MM-G1 AM4951RMM-G1 4951RMM-G1 Tube AM4951RMMTR-G1 4951RMM-G1 Tape & Reel AM4951MP-G1 4951MP-G1 Tube AM4951MPTR-G1 4951MP-G1 Tape & Reel AM4951RMP-G1 4951RMP-G1 Tube AM4951RMPTR-G1 4951RMP-G1 Tape & Reel 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. Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 4 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Absolute Maximum Ratings (Note 1, TA=25ºC) Symbol Value Unit Supply Voltage VCC 28 V Peak Output Current IOUT 500 mA FG/RD Pull-up Voltage VFG/VRD 28 V FG/RD Output Current IFG/IRD 10 mA Parameter Thermal Resistance (Junction to Ambient) Thermal Resistance (Junction to Case) Power Dissipation θJA θJC PD MSOP-8 205 PSOP-8 110 MSOP-10 195 MSOP-8 48 PSOP-8 36 MSOP-10 46 MSOP-8 585 mW PSOP-8 960 mW MSOP-10 585 mW °C/W °C/W Operating Temperature TOP -40 to 125 ºC Storage Temperature TSTG -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 operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions Parameter Symbol Min Max Unit Supply Voltage VCC 2.2 24 V Hall Input Voltage VICM 0 VCC-1.5 V TA -40 105 ºC Operating Ambient Temperature Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 5 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Electrical Characteristics VCC=12V, TA=25oC, unless otherwise specified. Parameter Supply Current Symbol Conditions Min Typ Max Unit ICC1 VCT=L 3 6 9 mA ICC2 VCT=H 2.5 5 7.5 mA CT Charge Current ICHG 0.9 1.3 1.5 µA CT Discharge Current IDHG 0.1 0.15 0.25 µA CT Charge/Discharge Current Ratio RCT 6 8 10 CT Clamp Voltage VCL 1.3 1.5 1.7 V CT Comparator Voltage VCP 0.3 0.5 0.7 V ICHG / IDHG OUT Low Saturation Voltage VSAT_L IOUT=200mA 0.25 0.45 V OUT High Saturation Voltage VSAT_H IOUT=200mA 0.95 1.2 V 7 15 mV 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) Apr. 2012 VHN VFG IFG=5mA 0.15 0.3 V IFGL VFG=15V 1 30 µA VRD IRD=5mA 0.15 0.3 V IRDL VRD=15V 1 30 µA VHB IHB=1mA 1.5 1.65 V Rev. 1. 4 1.35 BCD Semiconductor Manufacturing Limited 6 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Typical Performance Characteristics 9 12 ICC1 (VCT=L) ICC2 (VCT=H) 8 VCC=12V 10 o TA=25 C 7 ICC1 (VCT=L) 8 ICC2 (VCT=H) ICC (mA) ICC (mA) 6 5 6 4 4 3 2 2 1 0 3 6 9 12 15 18 21 0 -50 24 -25 0 25 50 75 100 125 VCC (V) TA ( C) Figure 4. Supply Current vs. Supply Voltage Figure 5. Supply Current vs. Ambient Temperature o 1.6 o VCC=12V, TA=25 C 1.4 900 Package: MSOP-8/MSOP-10 Power Dissipation (mW) 1.2 VSAT (V) 1.0 0.8 VSAT_H 0.6 VSAT_L 0.4 600 450 300 150 0.2 0.0 0 750 50 100 150 200 250 300 350 0 400 -50 -25 0 25 50 75 100 125 150 O TA ( C) IOUT (mA) Figure 6. Saturation Voltage vs. Output Current Apr. 2012 Figure 7. Power Dissipation vs. Ambient Temperature Rev. 1. 4 BCD Semiconductor Manufacturing Limited 7 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Typical Performance Characteristics (Continued) 1200 1050 Package: PSOP-8 900 PD (mW) 750 600 450 300 150 0 -50 -25 0 25 50 75 100 125 150 o TA ( C) Figure 8. Power Dissipation vs. Ambient Temperature Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 8 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Typical Application Note 2: Adding D1 can protect the IC from destruction by reverse connection. If D1 is used, it is necessary to insert a capacitor C1 to provide a regenerative current route. Similarly, if there is no nearby capacitor on the fan power supply line, C1 will also be necessary to improve reliability. Its capacity should be larger than 2.2µF. Note 3: If the Hall sensor bias is taken from VCC, A 1/2 VCC bias, as shown in the figure must be used. Adjusting 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 6: Each of R2, R3, R4 and R5 (AM4951/R only) is recommended to be 51kΩ typical. R1 is recommended to be 2k and must be added when VCC is larger than 20V. 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 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 9 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Typical Application (Continued) VRD VFG R1 R2 HB RD IN+ FG C3 HALL D1 VCC IN- AM4952 CT OUT2 C1 C2 GND OUT1 L Figure 10. Typical Application of AM4952 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 10 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Mechanical Dimensions MSOP-8 Apr. 2012 Rev. 1. 4 Unit: mm(inch) BCD Semiconductor Manufacturing Limited 11 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Mechanical Dimensions (Continued) Unit: mm(inch) 3.202(0.126) 3.402(0.134) PSOP-8 Apr. 2012 Rev. 1. 4 BCD Semiconductor Manufacturing Limited 12 Data Sheet BTL Drive Single-phase Full-wave Fan Motor Driver AM4951/R/2 Mechanical Dimensions (Continued) MSOP-10 Unit: mm(inch) 0.180(0.007) 0.280(0.011) 0.500(0.020) TYP 2.900(0.114) 3.100(0.122) 4.750(0.187) 5.050(0.199) 0.400(0.016) 0.800(0.031) 0.090(0.004) 0.230(0.009) 0.750(0.030) 0.950(0.037) 0.820(0.032) 1.100(0.043) 0.150(0.006) 2.900(0.114) 3.100(0.122) 0.020(0.001) 0° 6° Note: Eject hole, oriented hole and mold mark is optional. 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