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TDF5140

Brushless DC motor drive circuit

Philips Electronics 

Philips Semiconductors

Brushless DC motor drive circuit

Product specification

TDF5140A

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP.

CAP-CD

Isink

Isource

Isink/Isource

VIL

VIH

output sink current

output source current

ratio of sink to source current

LOW level input voltage

HIGH level input voltage

10.6 16.2

−5.3 −8.1

1.85 2.05

850 875

2.3

2.4

CAP-DC

Isink

Isource

Isink/Isource

VIL

VIH

output sink current

output source current

ratio of sink to source current

LOW level input voltage

HIGH level input voltage

10.1

−20.9

0.9

850

2.3

15.5

−15.5

1.025

875

2.4

Notes

1. An unstabilized supply can be used.

2. VVMOT = VP, all other inputs at 0 V; all outputs at VP; IO = 0 mA.

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.

MAX.

22

−11

2.25

900

2.55

20.9

−10.1

1.15

900

2.55

UNIT

µA

µA

mV

V

µA

µA

mV

V

APPLICATION INFORMATION

k, full pagewidth

(1)

GND1

10 220 18 nF

nF nF

18 17 16 15 14 13 12 11 10

TDF5140A

123456789

(1) Value selected for 3 Hz

start-up oscillator frequency

VMOT

PGIN

10 µF

PG/FG

18 nF

VP

MBK985

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

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

1999 March 15

9

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