ADP1050ACPZ-R7 datasheet(58/93 Pages) AD

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Data Sheet

ADP1050

FREQUENCY_SWITCH

The FREQUENCY_SWITCH command, which sets the switching frequency in kHz, is in linear format. Only the limited switching frequency

options in Table 32 are supported by the ADP1050. In the ADP1050, because the switching frequency is calculated from the switching period,

the switching period value that is used is an accurate measure, whereas the switching frequency may not be. For example, for the first

switching frequency option of 49 kHz (see Table 32), the actual switching frequency is calculated by 1/(20.48 µs) = 48.828125 kHz, which

is simplified (rounded) to 49 kHz.

To avoid an incorrect switching frequency setting, the go commands in Register 0xFE61[2:1] must be used to latch this setting and the

PWM setting.

Table 32. Register 0x33—FREQUENCY_SWITCH (Options Supported by the ADP1050)

Switching Frequency (kHz)

Accurate Switching Period (µs)

0000000000110001 (0x0031)

20.48

0000000000111000 (0x0038)

17.92

0000000000111100 (0x003C)

16.64

0000000001000001 (0x0041)

15.36

0000000001000111 (0x0047)

14.08

0000000001001110 (0x004E)

12.80

0000000001010111 (0x0057)

11.52

1111100011000011 (0xF8C3)

97.5

10.24

0000000001101000 (0x0068)

104

9.60

1111100011011111 (0xF8DF)

111.5

8.96

0000000001111000 (0x0078)

120

8.32

0000000010000010 (0x0082)

130

7.68

0000000010001000 (0x0088)

136

7.36

0000000010001110 (0x008E)

142

7.04

0000000010010101 (0x0095)

149

6.72

1111100100111001 (0xF939)

156.5

6.40

1111100101001001 (0xF949)

164.5

6.08

1111100101011011 (0xF95B)

173.5

5.76

0000000010111000 (0x00B8)

184

5.44

1111100110000111 (0xF987)

195.5

5.12

1111100110010011 (0xF993)

201.5

4.96

1111100110100001 (0xF9A1)

208.5

4.80

1111100110101111 (0xF9AF)

215.5

4.64

0000000011011111 (0xDF)

223

4.48

1111100111001111 (0xF9CF)

231.5

4.32

1111100111100001 (0xF9E1)

240.5

4.16

0000000011111010 (0x00FA)

250

4.00

1111101000001001 (0xFA09)

260.5

3.84

1111101000011111 (0xFA1F)

271.5

3.68

0000000100011100 (0x011C)

284

3.52

1111101001010011 (0xFA53)

297.5

3.36

1111101001110001 (0xFA71)

312.5

3.20

1111101010000001 (0xFA81)

320.5

3.12

0000000101001001 (0x0149)

329

3.04

0000000101010010 (0x0152)

338

2.96

0000000101011011 (0x15B)

347

2.88

0000000101100101 (0x0165)

357

2.80

1111101011011111 (0xFADF)

367.5

2.72

0000000101111011 (0x017B)

379

2.64

1111101100001101 (0xFB0D)

390.5

2.56

0000000110001101 (0x018D)

397

2.52

0000000110010011 (0x0193)

403

2.48

0000000110011010 (0x019A)

410

2.44

Rev. A | Page 57 of 92

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