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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Apr. 2011 Rev. 1. 2 BCD Semiconductor Manufacturing Limited

General Description

The AM4962 is a full wave driver IC with direct

PWM control function. It is used for single phase

motor and is capable of speed control by PWM pulse.

The AM4962 is available in HTSSOP-14 and

SSOP-16 packages.

Features

•

The Motor Speed is Controlled by PWM Pulse

Directly

• Built-in Triangle Wave Circuit Without Extra

Oscillation Capacitor

• Built-in Hall Bias Circuit

• Built-in Minimal Speed Setup Circuit

• Slope K* Adjustable

• Rotation Speed Indication (FG)

• Rotation or Lock State Indication (RD)

• Built-in Thermal Shutdown Circuit

• Lock Protection and Auto-restart

• Output Current Limit

* Slope K is the slope of output PWM duty vs. input

PWM duty

Applications

• CPU Cooler Fan in PC

• Brushless DC Motor Driver

Figure 1. Package Types of AM4962

HTSSOP-14 SSOP-16

Summary of content (16 pages)

PAGE 1
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER General Description Features The AM4962 is a full wave driver IC with direct PWM control function. It is used for single phase motor and is capable of speed control by PWM pulse. • The AM4962 is available in HTSSOP-14 and SSOP-16 packages.
PAGE 2
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Pin Configuration GH Package (HTSSOP-14) PGND PGND OUT2 1 14 OUT1 VCC 2 13 GND VMIN 3 12 CT PWM 4 11 RADJ CF 5 10 HIN- FG 6 9 HB RD 7 8 HIN+ GS Package (SSOP-16) OUT2 1 16 PGND NC 2 15 OUT1 VCC 3 14 GND VMIN 4 13 CT PWM 5 12 RADJ CF 6 11 HIN- FG 7 10 HB RD 8 9 HIN+ Figure 2. Pin Configuration of AM4962 (Top View) Apr. 2011 Rev. 1.
PAGE 3
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Pin Description Pin Number HTSSOP-14 SSOP-16 1 Pin Name Function 1 OUT2 Driver output 2 2 NC No connection 2 3 VCC Power supply 3 4 VMIN Minimum duty setting 4 5 PWM PWM pulse Input 5 6 CF PWM filter capacitor 6 7 FG Rotation speed indicator 7 8 RD Rotation/lock state indicator 8 9 HIN+ 9 10 HB 10 11 HIN- Hall sensor input - 11 12 RADJ Slope K adjustable terminal 12 13 CT 13 14 GND Ground
PAGE 4
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Functional Block Diagram V+ VMIN 6 (7) V+ V+ 51k 11 (12) 7 (8) 93k 90k 4 (5) 56k 18k 54k CF HB RD Predriver V+ PWM FG 3 (4) 42k RADJ Thermal Shutdown Triangle Wave 104k 2 (3) 5 (6) VCC Control Circuit 9 (10) Hall Bias 1 (1) OUT2 8 (9) HIN+ 10 (11) HIN- Lock Shutdown and Auto Restart Hysteresis Amp 12 (13) 14 (15) CT OUT1 (16) 13 (14) GND PGND A (B) A HTSSOP-14 B SSOP-16 Figure 3.
PAGE 5
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Ordering Information AM4962 Package - Circuit Type G1: Green Package GH: HTSSOP-14 GS: SSOP-16 Blank: Tube TR: Tape & Reel Temperature Range Part Number Marking ID Packing Type AM4962GH-G1 AM4962GH-G1 Tube AM4962GHTR-G1 AM4962GH-G1 Tape & Reel AM4962GS-G1 AM4962GS-G1 Tube AM4962GSTR-G1 AM4962GS-G1 Tape & Reel HTSSOP-14 -30 to 90°C SSOP-16 BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the par
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Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Absolute Maximum Ratings (Note 2) Parameter Symbol Value Unit Supply Voltage VCC 18 V Output Current IOUT 1.0 A Output Voltage VOUT 18 V HB Output Current IHB 10 mA RD Output Voltage VRD 18 V FG Output Voltage VFG 18 V RD Output Current IRD 10 mA FG Output Current IFG 10 mA Power Dissipation PD Storage Temperature Range TSTG Thermal Resistance (Junction to Ambient) θJA SSOP-16 0.8 W HTSSOP-14 1.
PAGE 7
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Electrical Characteristics (VCC=12V, TA=25°C, unless otherwise specified.) Parameter Symbol Conditions Min Typ Max IQ1 VCT=0 10.18 15 18.76 IQ2 VCT=5V 5.38 8 10.55 Quiescent Current Unit mA Output Saturation Voltage at High Side VSATH ISOURCE=200mA 1.0 1.17 V Output Saturation Voltage at Low Side VSATL ISINK=200mA 0.2 0.3 V 18 25 32 kHz CPWM Frequency fOSC CF High Level Voltage VCFH VPWM=0 3.2 3.6 3.
PAGE 8
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 20 20 16 16 Quiescent Current (mA) Quiescent Current (mA) Typical Performance Characteristics 12 8 VCC=12V 4 12 8 o TA=25 C 4 IQ1(VCT=L) IQ1(VCT=L) IQ2(VCT=H) IQ2(VCT=H) 0 -50 -25 0 25 50 75 100 0 125 4 6 8 O Ambient Temperature ( C) Figure 4. Quiescent Current vs. Ambient Temperature 12 14 16 18 Figure 5. Quiescent Current vs. Supply Voltage 1.2 2.
PAGE 9
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Typical Performance Characteristics (Continued) Allowed Power Dissipation (W) 1.2 Package: SSOP-16 1.0 0.8 0.6 0.4 0.2 0.0 -20 0 20 40 60 80 90 100 120 O Ambient Temperature ( C) Figure 8. Power Dissipation vs. Ambient Temperature Apr. 2011 Rev. 1.
PAGE 10
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Operating Diagram Figure 9. Operating Diagram of AM4962 Apr. 2011 Rev. 1.
PAGE 11
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Typical Application (Note 4) L1 100 Max. Duty Cycle AM4962 VCC D1 V+ 2 (3) 3 (4) C1 1μF 4 (5) 5 (6) C3 1μF OUT2 VCC VMIN PWM OUT1 GND 14 (15) 80 Output Duty Cycle (%) 1 (1) 13 (14) 12 (13) CT RADJ 11 (12) 10 (11) CF HIN- 6 (7) FG HB 7 (8) RD PGND HIN+ 9 (10) Hall C2 0.47μF 8 (9) 60 40 Slope K 20 Min.
PAGE 12
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Typical Application (Note 4, Continued) Note 4 (Refer to application circuit 2 unless otherwise noted.): Adjust slope K of output PWM's duty vs. input PWM's duty 1. The default K is about 0.8 (application circuit 1). 2. Adding R5 can increase K (see Figure 12). 3. Adding R6 can decrease K (see Figure 13).
PAGE 13
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Typical Application (Note 4, Continued) Adjust maximum duty of output PWM: 1. The default maximum output PWM duty is 100% (application circuit 1). 2. Adding R3 can decrease maximum output PWM duty (see Figure 16). 3. Adding R4 can increase maximum output PWM duty (see Figure 17).
PAGE 14
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Mechanical Dimensions HTSSOP-14 Unit: mm(inch) 1. 470(0. 058) 1. 570(0. 062) 6. 350(0. 250) 6. 550(0. 258) 1. 450(0. 057) 1. 550(0. 061) 6. 200(0. 244) 6. 600(0. 260) 4. 300(0. 169) 4. 500(0. 177) SEE DETAIL A 0. 750(0. 030) 0. 850(0. 033) 0.200(0.008) or 1.480(0.058) 0.280(0.011) or 1.610(0.063) 0.100(0.004) 0.190(0.007) 0. 650(0. 026) BSC 1. 300(0. 051) BSC 1. 200(0. 047) MAX 0. 340(0. 013) 0. 540(0. 021) 0. 200(0.
PAGE 15
Data Sheet SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962 Mechanical Dimensions (Continued) SSOP-16 Unit: mm(inch) o o Φ o o o o Apr. 2011 Rev. 1.
PAGE 16
BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein.