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PIP202-12M-2 Datasheet(PDF) 3 Page - NXP Semiconductors

Part # PIP202-12M-2
Description  DC-to-DC converter powertrain
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PIP202-12M-2 Datasheet(HTML) 3 Page - NXP Semiconductors

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Philips Semiconductors
PIP202-12M-2
DC-to-DC converter powertrain
Product data
Rev. 02 — 24 November 2003
3 of 20
9397 750 11943
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
6.2 Pin description
[1]
All pins connected to PAD1
[2]
All pins connected to PAD2
[3]
All pins connected to PAD3
[4]
PAD1, PAD2 and PAD3 are electrical connections and must be soldered to the printed circuit board
[5]
All n.c. pins should be connected to VSSC.
7.
Functional description
7.1 Basic functionality
In order to understand the functions performed by the PIP202-12M, consider the
requirements of a synchronous DC-to-DC converter output stage, driven from a PWM
controller (Figure 3).
When the input voltage is HIGH, the upper MOSFET must be on and the lower
MOSFET must be off. Current flows from the supply (VDDO), through the upper
MOSFET and the inductor (Lout), to the output.
Table 2:
Pin description
Symbol
Pin
I/O
Description
VDDO
1 to 8, 60, 61,
68
[1] [4]
-
output stage supply voltage
VSSC
9, 15, 22 to 24 [2] [4]
-
control circuit supply ground
VO
10, 26, 27,
45 to 59,
62 to 67
[3] [4]
O
output
CB
11, 12
I/O
bootstrap capacitor connection
VDDC
13, 14
-
control circuit supply voltage
VI
16, 17
I
pulse width modulated input
VSSO
28 to 44
-
output stage supply ground
n.c.
18 to 21, 25
[5]
-
no internal connection
Fig 3.
Simplified functional block diagram of a synchronous DC-to-DC converter
output stage.
VI
VDDC
VSSC
VO
VDDO
input voltage
from PWM controller
control circuit supply (12 V)
output stage supply voltage
tp
tp
T
T
δ =
VI
VSSO
CB
03ad36
output
100
nF
Lout
Cout
signal ground power ground


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