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]

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

Table 2:

Pin description

Symbol

Pin

I/O

Description

1 to 8, 60, 61,

68

[1] [4]

-

output stage supply voltage

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

13, 14

-

control circuit supply voltage

VI

16, 17

I

pulse width modulated input

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