TEA1552T データシートの表示（PDF） - Philips Electronics

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TEA1552T

GreenChip™II SMPS control IC

Philips Electronics 

Philips Semiconductors

GreenChip™II SMPS control IC

Product specification

TEA1552

SYMBOL

PARAMETER

CONDITIONS

Vvco(max)

peak voltage on pin Isense, where

the frequency is equal to fosc(l)

Duty cycle control (pin CTRL)

VCTRL(min)

minimum voltage on pin CTRL for

maximum duty cycle

VCTRL(max)

maximum voltage on pin CTRL for

minimum duty cycle

5 V output (pin VCC(5V))

VCC(5V)

output voltage

ICC(5V)

current capability of pin VCC(5V)

LOCK input (pin LOCK)

IO = 1 mA

VLOCK

LOCK trip level

VCC(reset)

voltage level on pin VCC which

resets the latch

RELLOCK,5V relation to 5 V output (pin VCC(5V))

Valley switch (pin DRAIN)

VLOCK < 2.3 V

VLOCK = 0.5 × VCC(5V)

∆V/∆tvalley

tvalley-swon

valley recognition voltage change

delay from valley recognition to

switch-on

Overcurrent and short winding protection (pin Isense)

Vsense(max)

tPD

Vswp

tleb

maximum source voltage OCP

propagation delay from detecting

Vsense(max) to switch-off

short winding protection voltage

blanking time for current and short

winding protection

∆V/∆t = 0.1 V/µs

∆V/∆t = 0.5 V/µs

ISS

soft start current

Overvoltage protection (pin DEM)

Vsense < 0.5 V

IOVP(DEM)

OVP level on pin DEM

set by resistor RDEM; see

Section “OverVoltage

Protection (OVP)”

Overpower protection (pin DEM)

IOPP(DEM)

OPP current on pin DEM to start

OPP correction

set by resistor RDEM; see

Section “OverPower

Protection (OPP)”

IOPP50%(DEM)

OPP current on pin DEM, where

maximum source voltage is limited

to 0.3 V

MIN. TYP. MAX. UNIT

−

VCO1 − 25 −

mV

−

1.0

−

1.5

−

V

−

V

4.75 5.0

−1.0 −

2.37 2.5

−

4.5

−4 −

−85 −

−

150(1)

5.25 V

−

mA

2.63 V

−

V

+4 %

+85 V/µs

−

ns

0.48 0.52

−

140

0.83 0.88

300 370

45 60

54 60

0.56 V

185 ns

0.96 V

440 ns

75 µA

66 µA

−

−24

−

−100

−

µA

−

µA

2002 Aug 27

13

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