tea1781 NXP Semiconductors, tea1781 Datasheet - Page 3

• Manufacturer Part Number: tea1781
• Description: Greenchip Pc Secondary Control Ics
• Manufacturer: NXP Semiconductors

NXP Semiconductors
5. Block diagram
TEA1781_82_1
Preliminary data sheet
Fig 1.
V
V
Control 5 V
trip
trip(ENABLE)
Drive SR
28
TEA1781T block diagram
26 27
Drive 5 V
t
2
d
I
ENABLE
Enable
Q R
3
VDD
S
1
10
11 12
Temperature
protection
6
V
I-control 5 V
otp
V
7
Protection 5 V
ovp(VOUT_5V)
9
PowerGood
I
O
V/I
Rev. 01 — 13 February 2009
I
O
I
V/I
> I
22
I
ocp
V
ocp
ref(5V)
V
uvp(VOUT_5V)
PGOOD
V
6
ref(OCP)
PowerOK
Control 3.3 V
Q R
8
S
I pd
24
18
23 25 17 16
VDD
Pull-down
TEA1781T; TEA1782T
I pd
Soft Start
Drive
3.3 V
start
start
GreenChip PC secondary control ICs
I-control 3.3 V
21
20
V
V
V
Protection
3.3 V
ref(5V)
ref(3V3)
ovp(VOUT_3V3)
I
O
I
> I
V/I
V reg(VDD)
Start-up
V
ocp
ref(3V3)
I
O
V
uvp(VOUT_3V3)
© NXP B.V. 2009. All rights reserved.
15
14
13
19
4
VSTARTUP
VDD
GND
GND
VSENSE_3V3
014aaa181
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