TEA1552 Ver la hoja de datos (PDF) - Philips Electronics
Número de pieza
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TEA1552 Datasheet PDF : 24 Pages
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Philips Semiconductors
GreenChip™II SMPS control IC
BLOCK DIAGRAM
Product specification
TEA1552
handbook, full pagewidth
VCC 8
S1
10
GND
SUPPLY
MANAGEMENT
M-level
internal UVLO start
supply
VOLTAGE
CONTROLLED
OSCILLATOR
3
STDBY
1
VCOadj
13
CTRL
FREQUENCY
CONTROL
POWER-ON
RESET
−1
TEA1552
LOCK
12
300 Ω
2.5 V
5.6 V
lock
detect
OVER-
TEMPERATURE
PROTECTION
START-UP
CURRENT SOURCE
VALLEY
clamp
LOGIC
100 mV
OVER-
VOLTAGE
PROTECTION
7
DRAIN
5, 6
HVS
14
DEM
LOGIC
SQ
UVLO R Q
MAXIMUM
ON-TIME
PROTECTION
DRIVER
LEB
blank
OCP
4
DRIVER
Iss
soft
0.5 V
start
S2
2
Isense
SQ
VCC < 4.5 V R Q
short
winding
0.88 V
OVER-POWER
PROTECTION
5 V/1 mA
(max)
11
VCC(5V)
MBL499
Fig.2 Block diagram.
2002 Aug 27
4
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