TEA1738T Ver la hoja de datos (PDF) - NXP Semiconductors.
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TEA1738T Datasheet PDF : 21 Pages
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NXP Semiconductors
5. Block diagram
TEA1738T; TEA1738LT
GreenChip SMPS control IC
VCC
GND
1
22 V
clamp
21 V
12 V
6V
5V
latch
VCCstart
VCCstop
Vctrl(Ipeak)
400 mV
latch reset
DQ
driver
overpower
OPP switch
2.5 V
2
clamp
power down
restart
RESTART
CONTROL
30 V
COUNT
TO 8
OVP
TEMPERATURE
PROTECTION
OTP
OPP switch
driver
107 μA
OPTIMER
1.2 V / 4.5 V
set
δmax
OSCILLATOR
frequency reduction
Vctrl(Ipeak)
ANALOG
CONTROL
MODULATION
SLOPE
COMPENSATION
11 μA
8
OPTIMER
5.4 V
7 kΩ
7
CTRL
DRIVER
ISENSE
DRV
3
S set
Q
R
stop
δmax
BLANK
55
μA
soft start LEB
restart
4
soft start
Vctrl(Ipeak)
OCP
OVERPOWER
CORRECTION
stop
VINSENSE
latch
overload
VCCstop
QS
overpower
R
driver
stop
δ max prot
COUNT
TO 8
δ max
restart
S
Q
R
δ max prot
overload(1)
lowvin
VCCstart
power down
lowvin
protlow
latch
S
Q
R
OTP
prothigh
protlow
OVP
overload(1)
latch reset
DIGITAL CONTROL
prothigh
protlow
lowvin
32
μA
0.50 V/0.80 V 6
107
μA
PROTECT
0.72 V/0.94 V
5
VINSENSE
001aan167
(1) In the TEA1738LT the overload signal switches the IC to the latched-off state. In the TEA1738T the overload signal triggers the
restart timer.
Fig 1. Block diagram
TEA1738T_TEA1738LT
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 14 January 2011
© NXP B.V. 2011. All rights reserved.
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