tea1753lt NXP Semiconductors, tea1753lt Datasheet - Page 4

• Manufacturer Part Number: tea1753lt
• Description: Tea1753lt Greenchip Iii Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
5. Block diagram
TEA1753LT
Objective data sheet
Fig 1.
PFCSENSE
VINSENSE
PFCCOMP
VOSENSE
PFCAUX
Block diagram
9
11
8
7
6
2.50 V
boost
500 mV
60 µA
8 µA
DETECT
2.5 V
VALLEY
boost
SOFT START
SOFT STOP
V
V
V
o
o
o
OCP
start flyback
short
OVP
power
down
low Vin
boost
-100 mV
latch
reset
BLANK
3.5 V
TIMER 50 µs
clamp
PFC gate
low power
3.5 V
low Vin
TIMER 4 µs
MAXIMUM
PFC driver
enable PFC
start stop PFC
3.7 V
PFCTIMER
PFC driver
DELAY
PFC gate
CURRENT
PFC clamp
PFC
protection
SIGNAL
ZERO
14
1.25 V
protection protection
All information provided in this document is subject to legal disclaimers.
PFC
enable PFC
low power
delay
external protection
external protection
external protection
low power delay
V
o
charge
PFCDRIVER
OVP flyback
Rev. 01 — 4 March 2011
start flyback
power down
power down
OSCILLATOR
PFC clamp
OTP
latch reset
protection
V
V
CC
time-out
th(UVLO)
ton max
V
PFC
V
startup
12
UVLO
good
OTP
driver
HV
16
R
S
S
S
S
S
S
R
R
Q
V
PROTECTION
PROTECTION
CC
CONTROL
CONTROL
LATCHED
RESTART
CHARGE
1
SMPS
SAFE
FBDRIVER
t
on(max)
13
Q
V
V
internal supply
startup
th(UVLO)
driver
R
S
frequency reduction
OSCILLATOR
FLYBACK
V
start flyback
start stop PFC
charge
CC
V
flyback driver
flyback gate
low power
delay
o
DETECT
VALLEY
short
good
protection
clamp
TEMPERATURE
enable flyback
protection
enable flyback
start flyback
GreenChip III SMPS control IC
flyback
flyback driver
ZERO CURRENT
OVP
protection
frequency
reduction
OPP
external
time-out
SIGNAL
power
OTP
low
COUNTER
MINIMUM
START
SOFT
TEA1753LT
OPP
GND
2.5 V
BLANK
80 µA
1.25 V
2
flyback
gate
60 µA 3 µA
OCP
OVP
© NXP B.V. 2011. All rights reserved.
3.5 V
OPP
80 mV
30 µA
001aan779
10
5
3
4
LATCH
FBCTRL
FBSENSE
FBAUX
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