TEA1733AT

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© NXP B.V. 2010. All rights reserved.

Preliminary data sheet

Rev. 2 — 19 November 2010

11 of 18

NXP Semiconductors

TEA1733AT

GreenChip SMPS control IC

output current on pin

PROTECT

−34

−32

−30

μA

87

107

127

μA

clamp voltage on pin

PROTECT

[1] 3.5

4.1

4.7

V

Peak current control (pin CTRL)

voltage on pin CTRL

for minimum flyback peak

current

1.5

1.8

2.1

V

for maximum flyback peak

current

3.4

3.9

4.3

V

internal resistance on

pin CTRL

57

9k

Ω

output current on pin

CTRL

−0.7

−0.5

−0.3

mA

−0.28

−0.2

−0.12

mA

Pulse width modulator

oscillator frequency

85.5

91.5

97.5

kHz

modulation frequency

210

280

350

Hz

Δf

mod

modulation frequency

variation

±4

±5

±6kHz

δ

max

maximum duty cycle

68.5

72

79

%

frequency reduction start

voltage

pin CTRL

1.5

1.8

2.1

V

zero duty cycle voltage

pin CTRL

1.25

1.55

1.85

V

Overpower protection (pin OPTIMER)

protection voltage on pin

OPTIMER

2.4

2.5

2.6

V

protection current on pin

OPTIMER

no overpower situation

100

150

200

μA

overpower situation

−12.2

−10.7

−9.2

μA

Restart timer (pin OPTIMER)

restart voltage on pin

OPTIMER

low level

0.8

1.2

1.6

V

high level

4.1

4.5

4.9

V

restart current on pin

OPTIMER

charging OPTIMER

capacitor

−127

−107

−87

μA

discharging OPTIMER

capacitor

−0.1

0

0.1

μA

Current sense (pin ISENSE)

maximum sense voltage

ΔV/Δt= 50 mV/μs;

0.48

0.51

0.54

V

ΔV/Δt = 200 mV/μs;

0.50

0.53

0.56

V

overpower protection

sense threshold voltage

370

400

430

mV

ΔV

slope compensation

voltage on pin ISENSE

ΔV/Δt= 50 mV/μs

2033

46mV/

μs

Table 5.

the IC; unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit