UPC1935 データシートの表示（PDF） - NEC => Renesas Technology

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UPC1935

DC-DC CONVERTER CONTROL IC

NEC => Renesas Technology 

µ PC1935

2. CONFIGURATION AND OPERATION OF EACH BLOCK

Figure 2-1 Block Diagram

FB1 7

II1 6

DTC2 12

FB2 10

II2 11

DTC3 16

FB3 14

II3 15

Error amplifier

0.3 V

Error amplifier

0.3 V

Error amplifier

0.3 V

VREF 2

VCC 1

Reference

voltage

section

Dead time setting: 85 %

(internally fixed)

DLY

5

CDLY

Soft start

select switch

Oscillation (common to each channel)

section

PWM

comparator

Output

section

PWM

comparator

Output

section

PWM

comparator

Under voltage

lock-out

section

Output

section

SCP

comparator

Q1

1.9 V 0.63 V

SQ

Q2

Q

Timer latch for

short-circuit

protection section

3 RT

8 OUT1

9 OUT2

13 OUT3

4 GND

Data Sheet G13418EJ3V0DS00

11

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