TPS23757EVM【PDF 4/39 页】EVALUATION MODULE FOR TPS23757

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TPS23757

SLVS948D – JULY 2009 – REVISED NOVEMBER 2013

www.ti.com

PARAMETER

TEST CONDITIONS

MIN

TYP MAX

UNIT

FRS

Switching frequency

CTL = V B , measure GATE, R FRS = 68.1 k ?

227

253

278

kHz

D MAX

V SYNC

Duty cycle

Synchronization

CTL= V B , measure GATE

Input threshold

76

2

78

2.2

80

2.4

%

V

CTL

V ZDC

0% duty cycle threshold

Softstart period

Input resistance

V CTL ↓ until GATE stops

Interval from switching start to V CSMAX

1.3

1.9

70

1.5

3.9

100

1.7

6.2

145

V

ms

k ?

BLNK

Blanking delay

(In addition to t 1 )

BLNK = RTN

R BLNK = 49.9 k ?

35

38

55

55

78

70

ns

DT

CTL = V B , C GATE = 1 nF,

C GAT2 = 1 nF, measure GATE, GAT2

t DT1

t DT2

t DT1

t DT2

Dead time

See Figure 2 for t DTx definition

R DT = 24.9 k ? , GAT2 ↑ to GATE ↑

R DT = 24.9 k ? , GATE ↓ to GAT2 ↓

R DT = 75 k ? , GAT2 ↑ to GATE ↑

R DT = 75 k ? , GATE ↓ to GAT2 ↓

40

40

120

120

50

50

150

150

62.5

62.5

188

188

ns

CS

V CSMAX

t 1

V SLOPE

I SL_EX

Maximum threshold voltage

Turnoff delay

Internal slope compensation

voltage

Peak slope compensation

current

Bias current (sourcing)

V CTL = V B , V CS rising until GATE duty cycle drops

V CS = 0.65 V

Peak voltage at maximum duty cycle, referenced to CS

V CTL = V B , I CS at maximum duty cycle

DC component of I CS

0.5

24

120

30

1

0.55

40

155

42

2.5

0.6

70

185

54

4.3

V

ns

mV

μ A

μ A

GATE

Source current

Sink current

V CTL = V B , V C = 12 V, GATE high, pulsed measurement

V CTL = V B , V C = 12 V, GATE low, pulsed measurement

0.37

0.7

0.6

1.0

0.95

1.4

A

A

GAT2

Source current

Sink current

V CTL = V B , V C = 12 V, GAT2 high, R DT = 24.9 k ? , pulsed

measurement

V CTL = V B , V C = 12 V, GAT2 low, R DT = 24.9 k ? , pulsed

measurement

0.37

0.7

0.6

1.0

0.95

1.4

A

A

APD / PPD

V APDEN

V APDH

APD threshold voltage

V APD rising

Hysteresis

(2)

1.43

0.29

1.5

0.31

1.57

0.33

V

Hysteresis

Hysteresis

V PPDEN

V PPDH

V PPD2

V PPD2H

PPD threshold voltage

V PPD - V VSS rising, UVLO disable

(2)

V PPD - V VSS rising, Class enable

(2)

1.45

0.29

7.4

0.5

1.55

0.31

8.3

0.6

1.65

0.33

9.2

0.7

V

V

APD leakage current

(source or sink)

V C = 12 V, V APD = V B

1

μ A

I PPD

PPD sink current

V PPD -V VSS = 1.5 V

2.5

5

7.5

μ A

THERMAL SHUTDOWN

Turnoff temperature

(3)

Hysteresis

T J rising

135

145

20

155

°C

°C

(2)

(3)

The hysteresis tolerance tracks the rising threshold for a given device.

These parameters are provided for reference only, and do not constitute part of TI's published specifications for purposes of TI's product

warranty.

4

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