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TEA1541

SMPS control IC with synchronization function

Philips Electronics 

Philips Semiconductors

SMPS control IC with

synchronization function

Product specification

TEA1541

SYMBOL

PARAMETER

CONDITIONS

MIN. TYP.

Overcurrent and winding short-circuit protection (pin Isense)

Vsense(max)

maximum source voltage for OCP

fsmps(min);

∆V/∆t = 0.1 V/µs

fsmps(max);

∆V/∆t = 0.1 V/µs

tPD

Vswp

propagation delay from detecting

Vsense(max) to switch-off

winding short-circuit protection

voltage

∆V/∆t = 0.5 V/µs

∆V/∆t = 0.5 V/µs

tleb

blanking time for current and winding

short-circuit protection

Iss

Vss(max)

soft start current

soft start maximum sense voltage

Vsense < 0.5 V

Overvoltage protection (pin DEM)

0.48 0.52

0.33 0.37

−

140

0.83 0.88

320 380

45

60

0.45 0.50

IOVP(DEM)

OVP trigger current

see Section

54

60

“Overvoltage protection”

Driver (pin DRIVER)

Isource

source current capability of driver

Isink

sink current capability of driver

Vo(driver)(max)

maximum output voltage of driver

Temperature protection

VCC = 9.5 V;

VDRIVER = 5 V

VCC = 9.5 V;

VDRIVER = 5 V

VCC = 9.5 V;

VDRIVER = 9.5 V

VCC > 12 V

−

−100

−

500

400 700

−

11.5

Tprot(max)

Tprot(hys)

maximum temperature protection

level

hysteresis for the temperature

protection level

130 140

−

8

Notes

1. Guaranteed by design.

2. This is also the minimum SMPS switching frequency in synchronized mode.

3. This is also the maximum oscillator frequency in synchronized mode.

MAX. UNIT

0.56 V

0.41 V

185 ns

0.96 V

480 ns

75

µA

0.55 V

66

µA

−75 mA

−

mA

−

mA

12

V

150 °C

−

°C

2003 Aug 11

14

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