tea1752t NXP Semiconductors, tea1752t Datasheet - Page 4

• Manufacturer Part Number: tea1752t
• Description: Greenchip Iii Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
5. Block diagram
TEA1752T_LT
Product data sheet
Fig 1.
PFCSENSE
VINSENSE
PFCCOMP
VOSENSE
PFCAUX
Remark:
TEA1752LT time-out is latched.
TEA1752T time-out is safe restart.
Block diagram
9
11
8
7
6
2.50 V
1.12 V
boost
500 mV
60 μA
15 μA
DETECT
VALLEY
SOFT START
SOFT STOP
V
V
V
o
o
o
OCP
start flyback
short
OVP
boost
−100 mV
latch
reset
low Vin
BLANK
3.5 V
3.5 V
TIMER 50 μs
3.5 V
clamp
PFC gate
low power
low Vin
TIMER 4 μs
MAXIMUM
PFC driver
enable PFC
start stop PFC
3.7 V
PFCTIMER
PFC clamp
PFC driver
DELAY
PFC gate
CURRENT
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. 02 — 24 June 2010
start flyback
OSCILLATOR
PFC clamp
OTP
latch reset
V
protection
V
CC
th(UVLO)
time-out
time-out
ton max
V
PFC
V
startup
12
UVLO
good
OTP
driver
HV
16
R
S
S
S
S
S
R
S
S
R
Q
(TEA1752LT only)
(TEA1752T only)
SAFE RESTART
PROTECTION
V
PROTECTION
CC
CONTROL
CONTROL
LATCHED
CHARGE
1
SMPS
FBDRIVER
t
on(max)
13
Q
internal supply
V
V
TEA1752T; TEA1752LT
startup
th(UVLO)
driver
R
S
frequency reduction
OSCILLATOR
FLYBACK
V
V
start flyback
start stop PFC
charge
CC
o
flyback driver
flyback gate
low power
delay
short
DETECT
VALLEY
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
START
MINIMUM
SOFT
OPP
GND
2.5 V
BLANK
80 μA
1.25 V
2
flyback
gate
60 μA 3 μA
OCP
OVP
© NXP B.V. 2010. All rights reserved.
3.5 V
OPP
80 mV
30 μA
014aaa742
10
5
3
4
LATCH
FBCTRL
FBSENSE
FBAUX
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