ZHCSCK8G May 2014 – October 2017 LP8860-Q1
PRODUCTION DATA.
Address 0x71
EEPROM Register 17 | |||||||
---|---|---|---|---|---|---|---|
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
BOOST_EN_SPREAD_
SPECTRUM |
BOOST_SEL_IND[1:0] | BOOST_SEL_IRAMP[1:0] | BOOST_FREQ_SEL[2:0] |
Name | Bit | Access | Description | ||||
---|---|---|---|---|---|---|---|
BOOST_EN_SPREAD_
SPECTRUM |
7 | R/W | Boost spread spectrum (±3% from central frequency, 1.875 kHz modulation frequency) enable
0 = Spread spectrum disabled 1 = Spread spectrum enabled |
||||
BOOST_SEL_IND[1:0] | 6:5 | R/W | See BOOST_SEL_IRAMP for selecting BOOST_SEL_IND setting | ||||
BOOST_SEL_IRAMP[1:0] | 4:3 | R/W | Boost artificial current ramp peak value, A/s.
Select value higher than IRAMP_GAIN: IRAMP_GAIN =1.2 x 0.5 x (VOUTmax - VINmin)/(0.7 x L x 60000), where VIN, VOUT are boost input and output voltage, L - inductance, H. 25-mΩ RSENSE is suggested. |
||||
BOOST_SEL_IND[1:0] | |||||||
BOOST_SEL_IRAMP
[1:0] |
00 | 01 | 10 | 11 | |||
00 | 130 | 65 | 34 | 29 | |||
01 | 88 | 43 | 23 | 20 | |||
10 | 56 | 28 | 15 | 13 | |||
11 | 37 | 18 | 10 | 8.5 | |||
BOOST_FREQ_SEL[2:0] | 2:0 | R/W | BOOST_EXT_CLK_SEL=0
Boost output frequency selection (internal oscillator) 000= 100 kHz 001 = 200 kHz 010 = 303 kHz 011 = 400 kHz 100 = 629 kHz 101 = 800 kHz 110 = 1100 kHz 111 = 2200 kHz BOOST_EXT_CLK_SEL=1 Boost output frequency selection (for external sync mode if external sync disappears) 000= 100 kHz 001 = 200 kHz 010 = 303 kHz 011 = 400 kHz 100 = 625 kHz 101 = 833 kHz 110 = 1111 kHz 111 = 2500 kHz |