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TPS65530

SLVS744B – OCTOBER 2007 – REVISED NOVEMBER 2007

ELECTRICAL CHARACTERISTICS (continued)

0

°C ≤ T

PARAMETER

TEST CONDITIONS

MIN

MAX

UNIT

Overcurrent protection threshold

1.3

1.6

A

Overvoltage protection threshold

1.09

1.25

1.38

V

(sensing at FB5 pin)

VPS = 5 V

610

900

m

Ω

Load switch ON resistance

100

470

m

Ω

Load switch ramp-up time

200

µS

(5)

µF

Load switch leakage current

1

µA

MAX DUTY cycle

96

98

%

Trigger voltage to start up CH6

SEQ56 = AGND

0.8

V

CH6

Supply voltage

2.5

5.5

V

–10

–5

V

Feedback resistance: R1 = 136 k

Ω,

100

mA

R2 = 820 k

Ω

FB6 reference voltage

No load

–0.02

0

0.02

V

Overcurrent protection threshold

1.1

1.35

A

Overvoltage protection threshold

–0.3

–0.2

–0.1

V

(sensing at FB6 pin)

640

1100

m

Ω

Max duty cycle

84

91

98

%

Trigger voltage to power off CH6

SEQ56 = AGND

0.5

0.53

0.56

V

S/S56 pin voltage

1.22

1.25

1.28

V

S/S56 pin source current

S/S56 = AGND

170

200

230

µA

CH7

1.5

5.5

V

3

20

V

Feedback resistance: R1 = 47 k

Ω,

3.7

5

6.3

mA

R2 = 680 k

Ω, Rsense = 10 Ω,

B_ADJ pin voltage = 0 V

Feedback resistance: R1 = 47 k

Ω,

23.7

25

26.3

mA

R2 = 680 k

Ω, Rsense = 10 Ω,

B_ADJ pin voltage = 1 V

FBV reference voltage

No load

0.97

1

1.03

V

Overvoltage protection threshold

1.15

1.25

1.35

V

(sensing at FBV pin)

Overcurrent protection threshold

0.8

1.2

A

700

1200

m

Ω

Max duty cycle

86

91

99

%

Load switch ON resistance

2

4

Ω

Load switch leakage current

1

µA

(between C-IN and FBC)

B-ADJ pin input impedance

1

M

Ω

(6)

The value of FET On resistance includes the resistance of bonding wire.

(7)

Specified by design

(8)

Due to constant current control for CH7, the operating condition is that Input voltage is less than LED supply voltage (Output voltage).

8

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