1999 March 15

9

Philips Semiconductors

Product specification

Brushless DC motor drive circuit

TDF5140A

Notes

1. An unstabilized supply can be used.

3. Switching levels with respect to MOT1, MOT2 and MOT3.

4. Drivers are in the high-impedance OFF-state.

5. The outputs are short-circuit protected by limiting the current and the IC temperature.

APPLICATION INFORMATION

CAP-CD

output sink current

10.6

16.2

22

µA

output source current

−5.3

−8.1

−11

µA

ratio of sink to source current

1.85

2.05

2.25

LOW level input voltage

850

875

900

mV

HIGH level input voltage

2.3

2.4

2.55

V

CAP-DC

output sink current

10.1

15.5

20.9

µA

output source current

−20.9

−15.5

−10.1

µA

ratio of sink to source current

0.9

1.025

1.15

LOW level input voltage

850

875

900

mV

HIGH level input voltage

2.3

2.4

2.55

V

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Fig.4 Application diagram without use of the operational transconductance amplifier (OTA).

(1) Value selected for 3 Hz start-up oscillator frequency.

k, full pagewidth

MBK985

18 nF

18 nF

220

nF

10

nF

GND1

VP

VMOT

PG/FG

PGIN

(1) Value selected for 3 Hz

start-up oscillator frequency

10

µF

18

17

16

15

14

13

12

10

11

123

4

5

6

7

9

8

TDF5140A

(1)