TEA1733T_TEA1733LT_1

© NXP B.V. 2009. All rights reserved.

Objective data sheet

Rev. 01 — 26 October 2009

2 of 17

NXP Semiconductors

TEA1733T; TEA1733LT

GreenChip SMPS control IC

3.

Applications

power supply solution of up to 75 W.

4.

Ordering information

5.

Block diagram

Table 1.

Ordering information

Type number

Package

Name

Description

Version

TEA1733T

SO8

plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

TEA1733LT

SO8

plastic small outline package; 8 leads; body width 3.9 mm

SOT96-1

(1) In the TEA1733LT the OverPwr signal switches the IC to the latched-off state. In the TEA1733T the OverPwr signal triggers the

restart timer.

Fig 1.

Block diagram

014aaa926

OVER POWER

CORRECTION

BLANK

OCP

LEB

VINSENSE

Latch

Stop

Soft Start

Restart

OSCILLATOR

Freq reduction

Set

DutyMax

MODULATION

SLOPE

COMPENSATION

ANALOG

CONTROL

Restart

VCCstop

HighVin

LowVin

Latch

LatchReset

DIGITAL CONTROL

Soft Start

55

µA

11

µA

8

7

2.5 V

1.2 V / 4.5 V

Restart

TEMP

PROT

VCCstart

DQ

VCCstop

LatchReset

RESTART

CONTROL

OPsw

OTP

OPTIMER

5.4 V

7 k

Ω

DutyMax

Stop

Set

PowerDown

Clamp

DRV

3

DRIVER

2

GND

1

VCC

ISENSE

4

Q

S

R

Driver

OverPwr

OPTIMER

CTRL

PROTECT

5

6

VINSENSE

OPsw

Q

S

R

Q

S

R

Clamp

Latch

21 V

6 V

22 V

12 V

5 V

400 mV

0.50 V/0.80 V

107

µA

32

µA

107

µA

ProtHigh

ProtLow

HighVin

LowVin

3.52 V

0.72 V/0.94 V

VCCstart

PowerDown

LowVin

ProtLow

OTP

ProtHigh

ProtLow