THMC40, THMC41

VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS

SLIS097 – MARCH 2000

4

POST OFFICE BOX 655303

dc

supply current

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VPWR

Supply voltage range

11

12

13

V

IVPWR

VPWR supply current

Idle condition in locked rotor detect

2.5

5

mA

IVPWR

VPWR supply current

ILOAD = –1 A, VOUT low, TA = 25°C

5

mA

ISLEEP

Sleep-state current

VPWM ≤ 0.4 V

300

400

µA

PHA, PHB low-side phase winding driver outputs

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ILEAK

PHA,PHB output leakage current

Output = OFF, VPHx = 12 V

0.1

10

µA

VOL

PHA, PHB low-level output voltage

Output = ON,

IPHx = 1 A, TA = 25°C

0.5

0.6

V

RDS(ON)

PHA, PHB output ON resistance

Output = ON,

IPHx = 1A, TA = 25°C

0.5

0.6

Ω

VCLAMP

PHA, PHB output active clamp voltage

Output = OFF, IPHx = 200 mA

32

38

V

Hall sensor signal conditioning

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

IIB(HL)

Hall input bias current

±0.1

±1

µA

VICR(HL)

ICR(HL) common-mode input voltage range

1

3.5

V

VIO

Hall comparator input offset voltage

Over VICR(HL) = 1 V to 3.5 V

–7

0

7

mV

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ILEAK

VOUT output sleep-state leakage current

Sleep state engaged,

VVOUT = 0 V to VPWR

±0.1

±10

µA

VOH

VOUT high-level output voltage

Run state, Output high

IVOUT = –1 A, TA = 25°C

VPWR

– 0.4

VPWR

– 0.6

V

RDS(ON)

VOUT output high-side resistance to VPWR

VOUT

, A

0.4

0.6

Ω

VRECIR

VOUT output recirculation voltage

Run state, Output low

– 0.3

– 0.5

V

RDS(ON)(SYNC)

VOUT synchronous switch resistance to PGND

,

IVOUT = –1 A, TA = 25°C

0.3

0.5

Ω

ILIMIT

Pulsed VOUT synchronous rectification current

limit

Run state, VOUT=VPWR=12V,

VCOSC > VPWM,

tPULSE = 100 µs, See Note 5

2

2.6

A

CP high-side gate drive charge pump capacitor input

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

VCP

Charge pump voltage

IVCP = –60 µA, VPWM = 2.5 V

22

26

V

VCP(UVLO)

VCP undervoltage lock-out

6.5

7.6

8.5

V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNITS

ICHARGE

COSC charge source current

VCOSC = 1.4 V, Charge mode

–130

–180

–230

µA

IDISCHARGE

COSC discharge sink current

VCOSC = 1.4 V, Discharge mode

130

180

230

µA

VDISCHARGE COSC upper threshold for switching to current sink

2

2.3

2.6

V

VCHARGE

COSC lower threshold for switching to current

source

0.43

0.5

0.57

V

NOTE 5: VOUT current limit, in conjunction with thermal shutdown function, provides device survivability under VOUT-to-VPWR short condition.