Diodes AM4962 User Manual

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Data Sheet

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

HTSSOP-14 SSOP-16

Figure 1. Package Types of AM4962

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Pin Configuration

GH Package

(HTSSOP-14)

PGND

OUT2

VCC

VMIN
PWM

CF

FG
RD

1
2
3
4

5
6

7

GS Package

(SSOP-16)

OUT2

NC

VCC

VMIN
PWM

CF

FG

RD

Figure 2. Pin Configuration of AM4962 (Top View)

1

2

3

4

5

6

7

8

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2

14
13
12
11

10

9
8

16

15

14

13

12

11

10

9

PGND
OUT1

GND

CT

RADJ

HIN-

HB
HIN+

PGND
OUT1

GND

CT

RADJ

HIN-

HB
HIN+

Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Pin Description

Pin Number

HTSSOP-14 SSOP-16

Pin Name Function

1 1

2

2 3
3 4
4 5
5 6
6 7
7 8
8 9
9 10

10 11
11 12
12 13
13 14

OUT2 Driver output 2

NC No connection

VCC Power supply

VMIN Minimum duty setting

PWM PWM pulse Input

CF PWM filter capacitor
FG Rotation speed indicator
RD Rotation/lock state indicator

HIN+ Hall sensor input +

HB Hall sensor bias regulator

HIN- Hall sensor input -

RADJ Slope K adjustable terminal

CT Lock and rotation setting capacitor terminal

GND Ground for control circuit

14 15

16

OUT1 Driver output 1

PGND Power ground

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Functional Block Diagram

VMIN

RADJ

PWM

CF

HB

HIN+

HIN-

V+

3 (4)

11 (12)

V+

4 (5)

5 (6)

9 (10)

8 (9)

10 (11)

104k

42k

90k

54k

V+

V+

51k

56k

Hall

Bias

Hysteresis Amp

Triangle Wave

93k

18k

Control

Circuit

Lock Shutdown

and

Auto Restart

12 (13) 13 (14)

CT

Thermal

Shutdown

Pre-

driver

(16)

GND PGND

6 (7)

7 (8)

2 (3)

1 (1)

14 (15)

A (B)
A HTSSOP-14
B SSOP-16

Figure 3. Functional Block Diagram of AM4962

Truth Table (Note 1)

Items IN- IN+ CF CT OUT1 OUT2 FG Mode

FG

RD

VCC

OUT2

OUT1

1 H L H L L Rotation

L

2 L H

L H Off PWM off

L

3 H L Off L L

H

4 L H

L Off Off PWM off

Rotation Recirculate

5 H L H Off L
6 L H

L H

Off H Off

Lock Protection

Note 1: VCF(H)=5V, VCF(L) =1V, VCT(H)=5V, VCT(L) =0

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Ordering Information

AM4962 -

Circuit Type G1: Green

Package

HTSSOP-14

SSOP-16

Package
GH: HTSSOP-14

GS: SSOP-16

Temperature

Range

-30 to 90°C

Part Number Marking ID

AM4962GH-G1 AM4962GH-G1
AM4962GHTR-G1 AM4962GH-G1
AM4962GS-G1 AM4962GS-G1
AM4962GSTR-G1 AM4962GS-G1

Blank: Tube
TR: Tape & Reel

Packing

Type

Tube

Tape & Reel

Tube

Tape & Reel

BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.

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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 I
Output Voltage 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 T
Thermal Resistance

(Junction to Ambient)
ESD (Human Body Model) ESD 2000 V

ESD (Machine Model) ESD 250 V

1.0 A

OUT

18 V

OUT

SSOP-16 0.8 W

HTSSOP-14 1.1 W

-55 to 150 °C

STG

θ

JA

SSOP-16 156

HTSSOP-14 114

°C/W

Note 2: 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 Typ Max Unit
Supply Voltage VCC 3.5 12 16 V
Hall Input Voltage + (Note 3) V
Hall Input Voltage - (Note 3) V
PWM High Level Voltage V
Ambient Temperature TA -30

0.2

IN+

0.2

IN-

PWM

3 V
3 V

VCC-1 V

90 °C

Note 3: Hall input voltage range includes the am pl it ude of s i gnal .

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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 Unit

IQ1 VCT=0 10.18 15 18.76

Quiescent Current

I

VCT=5V 5.38 8 10.55

Q2

mA

Output Saturation Voltage at High
Side

Output Saturation Voltage at Low
Side

CPWM Frequency f
CF High Level Voltage V
CF Low Level Voltage V
VMIN Voltage V
RADJ Pin Voltage V
Hall Input Hysteresis V

I

V

SATH

I

V

SATL

18 25 32 kHz

OSC

V

CFH

V

CFL

3.4 3.7 4.0 V

MIN

ADJ

HYS

V

±10 ±20 mV

=200mA 1.0 1.17 V

SOURCE

=200mA 0.2 0.3 V

SINK

=0 3.2 3.6 3.75 V

PWM

=5 1.83 1.95 2.15 V

PWM

PWM

=0

3.6 3.8 4.4 V

Hall Bias Voltage VHB IHB=5mA 1.1 1.25 1.4 V
CT High Level Voltage V
CT Low Level Voltage V
CT Charge Current I
CT Discharge Current I

3.55 3.7 3.88 V

CTH

1.55 1.7 1.85 V

CTL

1.5 2 2.85 µA

CHG

0.14 0.2 0.285 µA

DHG

CT Charge and Discharge Ratio RCD I
FG Output Low Level Voltage V
FG Leakage Current I
RD Output Low Level Voltage V
RD Leakage Current I

FGL

LFG

RDL

LRD

CHG/IDHG

IFG=5mA 0.2 0.3 V

VFG=12V 30 µA

IRD=5mA 0.2 0.3 V

VRD=12V 30 µA

8.5 10 14.5

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Typical Performance Characteristics

20

20

16

16

12

12

8

Quiescent Current (mA)

4

0

-50 -25 0 25 50 75 100 125

Ambient Temperature (OC)

VCC=12V

IQ1(VCT=L)
IQ2(VCT=H)

8

Quiescent Current (mA)

4

0

4 6 8 1012141618

Supply Voltage (V)

TA=25oC

IQ1(VCT=L)
IQ2(VCT=H)

Figure 4. Quiescent Current vs. Ambient Temperature Figure 5. Quiescent Current vs. Supply Voltage

2.0

1.6

1.2

V
V
V
V

SATH1

SATH2

SATL1

SATL2

VCC=12V, TA=25oC

0.8

Output Saturation Voltage (V)

0.4

0.0
0 100 200 300 400 500 600 700 800 900 1000

Output Current (mA)

Figure 6. Output Saturation Voltage vs. Figure 7. Power Dissipation vs.

Output Current Ambient Temperature

1.2

1.0

0.8

0.6

0.4

Allowable Power Dissipation (W)

0.2

0.0

-20 0 20 40 60 80 100

Ambient Temperature (OC)

Package: HTSSOP-14

90

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Typical Performance Characteristics (Continued)

1.2

1.0

0.8

0.6

0.4

0.2

Allowed Power Dissipation (W)

0.0

-20 0 20 40 60 80 100 120

Ambient Temperature (OC)

Figure 8. Power Dissipation vs. Ambient Temperature

Package: SSOP-16

90

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Operating Diagram

Figure 9. Operating Diagram of AM4962

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Typical Application (Note 4)

1 (1)

D1

1μF

V+

C1

C3

1μF

2 (3)

3 (4)

4 (5)

5 (6)

6 (7)

7 (8)

VCC

L1

AM4962

OUT2 OUT1

VCC GND
VMIN CT
PWM RADJ

CF HIN-

FG HB
RD HIN+

PGND

14 (15)

13 (14)

12 (13)

11 (12)

10 (11)

9 (10)

8 (9)

Hall

100

80

60

C2

0.47μF

40

Output Duty Cycle (%)

20

Min. Duty Cycle

0

0 102030405060708090100

Input PWM Duty Cycle (%)

Figure 10

Application 1 (Default)

VCC

D1

V+

D2

1 (1)

C1

F

1

R1

R2

C3

F

1

R3

R4

2 (3)

3 (4)

4 (5)

5 (6)

6 (7)

7 (8)

L1

AM4962

OUT2 OUT1
VCC GND

VMIN CT
PWM RADJ

CF HIN-

FG HB
RD HIN+

PGND

14 (15)

13 (14)

12 (13)

11 (12)

10 (11)

9 (10)

8 (9)

Hall

Slope K

D3

Max. Duty Cycle

C2

F

0.47

V+

R5

R6

Application 2 (Slope K and Minimum/Maximum Duty Adjustable)

Note: D2 and D3 are recommended to be used when the current in coil L1 is higher than 300mA.

Figure 11. Typical Applications of AM4962

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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).

100

80

60

R5=270k, R1, R2, R3, R4, R6 Open
R5=560k, R1, R2, R3, R4, R6 Open
R1, R2, R3, R4, R5, R6 Open

40

Output Duty Cycle (%)

20

0

0 102030405060708090100

Input PWM Duty Cycle (%)

Figure 12 Figure 13

Adjust minimum duty of output PWM:

1. The default minimum duty of output PWM is about 20% (application circuit 1, Figure 10).

2. Decreasing R2 can increase minimum output PWM duty (see Figure 14).

3. Adding R5 can decrease minimum output PWM duty (see Figure 15).

80

70

60

50

R1=15k,R3,R4,R5,R6 open

100

80

60

40

Output Duty Cycle (%)

20

0

0 102030405060708090100

R6=100k, R1, R2, R3, R4, R5 Open
R6=270k, R1, R2, R3, R4, R5 Open
R1, R2, R3, R4, R5, R6 Open

Input PWM Duty Cycle (%)

100

80

60

R1, R2, R3, R4, R6 open

40

30

Minimum Duty Cycle (%)

20

10

3.5k

4.0k

R2 (Ω)

5.5k

5.0k4.5k

6.0k

6.5k

40

Minimum Duty Cycle (%)

20

0

390K 560K 820K 1M 2.2M 4.7M 8.2M

R5 (Ω)

Figure 14 Figure 15

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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).

100

80

60

R3=390k, R1, R2, R4, R5, R6 Open
R3=1M, R1, R2, R4, R5, R6 Open
R1, R2, R3, R4, R5, R6 Open

40

Output Duty Cycle (%)

20

0

0 102030405060708090100

PWM (%)

Figure 16 Figure 17

100

Output Duty Cycle (%)

80

60

40

20

0

0 102030405060708090100

R4=150k, R1, R2, R3, R4, R6 Open
R4=390k, R1, R2, R3, R5, R6 Open
R1, R2, R3, R4, R5, R6 Open

PWM (%)

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Data Sheet

SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER AM4962

Mechanical Dimensions

HTSSOP-14 Unit: mm(inch)

6.350(0.250)

6.550(0.258)

0.750(0.030)

0.850(0.033)

1.300(0.051)
BSC

1.470(0.058)

1.570(0.062)

1.450(0.057)

1.550(0.061)

0.650(0.026)
BSC

1.200(0.047)

0.340(0.013)

0.540(0.021)

6.200(0.244)

6.600(0.260)

MAX

0.050(0.002)

0.200(0.008)

0.900(0.035)

1.050(0.041)

4. 300(0. 169)

4. 500(0. 177)

R0.090(0.004)

R0.090(0.004)

0.250(0.010)

0.450(0.018)

0.750(0.030)

MIN

BSC

0.200(0.008)
MIN

MIN

SEE

DETAIL A

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)

10
14

1.000(0.039)
REF

DETAIL A

BASE METAL

0.100(0.004)

0.150(0.006)

0.200(0.008) or 1.470(0.058)

0.240(0.009) or 1.570(0.062)

0
8

Note: Eject hole, oriented hole and mold mark is optional.

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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. 2 BCD Semiconductor Manufacturing Limited

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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use

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

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.

other rights nor the rights of others.

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