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PIP202-12M Datasheet, PDF (3/20 Pages) NXP Semiconductors – DC to DC converter powertrain
Philips Semiconductors
PIP202-12M
DC to DC converter powertrain
6.2 Pin description
Table 2: Pin description
Symbol Pin
I/O
VDDO
1 to 8, 60, 61,
-
68
[1] [4]
VSSC
VO
9, 15, 22 to 24 [2] [4] -
10, 26, 27,
45 to 59,
62 to 67
[3] [4]
O
CB
11, 12
I/O
VDDC
13, 14
-
VI
16, 17
I
VSSO
n.c.
28 to 44
−
18 to 21, 25 [5]
−
Description
output stage supply voltage
control circuit supply ground
output
bootstrap capacitor connection
control circuit supply voltage
pulse width modulated input
output stage supply ground
no internal connection
[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
output stage supply voltage
control circuit supply (12 V)
100
nF
VDDC CB VDDO
input voltage
from PWM controller
VI
VI
VSSC
VO
VSSO
Lout output
Cout
tp
T
δ=
tp
T
signal ground power ground
03ad36
Fig 3. Simplified functional block diagram of a synchronous DC to DC converter
output stage.
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.
9397 750 10031
Product data
Rev. 01 — 15 July 2002
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
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