TSZ02201-0P2P0B001840-1-2

16.Nov.2020 Rev.005

TSZ22111 • 15 • 001

22/36

BD64008MUV

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3

SWREG

― continued

3.5

SWREG1 Soft Start (at power-on, with ENBSW1 = L)

The rising edge of SWREG1 is synchronized with the timing when ENBSW1 = L and POR release.

Figure 11. SWREG1 Soft Start Operation Timing Diagram

This soft start method is realized by linearly changing the negative side voltage of the gmAMP by using DAC.

Parameter

Specification

Unit

Min

Typ

Max

6.97

8.20

9.43

ms

13.94

16.40

18.86

ms

Oscillation

Constant ON Duty

Duty

Increase

50 ms (Typ)

0 1 2

32

63

external resistor)

SWOUT1

Counter output

ENBSW1

POR signal

DAC1 output

0 V

1.0 V

0 V

2.0 V

3.9 kHz CLOCK

(Generated by dividing

the internal standard

clock)

external resistor)

0 V

RESET output

UVDET output