tea1738t NXP Semiconductors, tea1738t Datasheet - Page 3

• Manufacturer Part Number: tea1738t
• Description: Tea1738t; Tea1738lt Greenchip Smps Control Ic
• Manufacturer: NXP Semiconductors

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