THMC40_11 Datasheet, PDF (4/19 Pages) Texas Instruments – VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS

THMC40, THMC41
VARIABLE SPEED 12-VDC BRUSHLESS FAN MOTOR DRIVERS
SLIS097 – MARCH 2000
dc electrical characteristics, V_PWR = 12 V, T_A = – 30°C to 80°C (unless otherwise noted)
supply current
VPWR
IVPWR
ISLEEP
PARAMETER
Supply voltage range
VPWR supply current
Sleep-state current
TEST CONDITIONS
Idle condition in locked rotor detect
ILOAD = –1 A, VOUT low, TA = 25°C
VPWM ≤ 0.4 V
MIN TYP MAX UNITS
11
12
13 V
2.5
5 mA
5
mA
300 400 µA
PHA, PHB low-side phase winding driver outputs
PARAMETER
TEST CONDITIONS
ILEAK
VOL
RDS(ON)
VCLAMP
PHA,PHB output leakage current
PHA, PHB low-level output voltage
PHA, PHB output ON resistance
PHA, PHB output active clamp voltage
Output = OFF, VPHx = 12 V
Output = ON, IPHx = 1 A, TA = 25°C
Output = ON, IPHx = 1A, TA = 25°C
Output = OFF, IPHx = 200 mA
MIN TYP MAX UNITS
0.1
10 µA
0.5 0.6 V
0.5 0.6 Ω
32
38
V
Hall sensor signal conditioning
PARAMETER
IIB(HL)
VICR(HL)
VIO
Hall input bias current
ICR(HL) common-mode input voltage range
Hall comparator input offset voltage
TEST CONDITIONS
Over VICR(HL) = 1 V to 3.5 V
MIN TYP MAX UNITS
±0.1
±1 µA
1
3.5 V
–7
0
7 mV
V_OUT high-side phase winding driver output
PARAMETER
ILEAK
VOUT output sleep-state leakage current
VOH
VOUT high-level output voltage
RDS(ON)
VRECIR
RDS(ON)(SYNC)
VOUT output high-side resistance to VPWR
VOUT output recirculation voltage
VOUT synchronous switch resistance to PGND
ILIMIT
Pulsed VOUT synchronous rectification current
limit
TEST CONDITIONS
Sleep state engaged,
VVOUT = 0 V to VPWR
Run state, Output high
IVOUT = –1 A, TA = 25°C
Run state, Output low
IVOUT = –1 A, TA = 25°C
Run state, VOUT=VPWR=12V,
VCOSC > VPWM,
tPULSE = 100 µs, See Note 5
MIN TYP MAX UNITS
±0.1 ±10 µA
VPWR VPWR
– 0.4 – 0.6
V
0.4
0.6 Ω
– 0.3 – 0.5 V
0.3
0.5 Ω
2
2.6
A
CP high-side gate drive charge pump capacitor input
PARAMETER
TEST CONDITIONS
VCP
VCP(UVLO)
Charge pump voltage
VCP undervoltage lock-out
IVCP = –60 µA, VPWM = 2.5 V
MIN TYP MAX UNITS
22
26
V
6.5 7.6 8.5 V
C_OSC external oscillator capacitor
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.
4
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