TPIC2101

DC BRUSH MOTOR CONTROLLER

SLIS060 – OCTOBER 1995

7

POST OFFICE BOX 655303

POST OFFICE BOX 1443

manual mode speed signal decoding (continued)

2

3

499

Ω

499

Ω

I = 100

µA

VIO

20 k

Ω min

27.4 k

Ω

14 2.75 V

4

7

4.7

µF

MAN

AUTO

CCS

SPEED

INT

TPIC2101

Vbat

Enable

Switch

1 k

Ω

pot

Battery

47

Ω

Figure 4. Manual Mode Connections

As in the automatic mode, the device will adjust the GD terminal PWM duty cycle to keep the effective motor

PWMout +

(2.88

) 6.56(V

MAN *

V

AUTO

))

V

bat

100%

Figure 5 shows the output characteristic for various source voltages.

50

40

20

10

0

90

30

0

0.2

0.4

0.6

0.8

1

1.2

70

60

80

100

1.4

1.6

1.8

2

Vbat = 8

Vbat = 12

Vbat = 16

VMAN - VAUTO – Differential Voltage – V

Figure 5. Manual Mode Input Signal vs. Output PWM

characteristics table.