ISL6423 Datasheet, PDF (12/16 Pages) Intersil Corporation – Single Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs DiSEqC 2.0 Compatible

ISL6423
SR1H
0
0
0
0
0
0
0
0
0
0
0
SR1M
0
0
0
0
0
0
0
0
0
0
0
SR1L
0
0
0
0
0
0
0
0
0
0
0
OTF
X
X
X
X
X
X
X
X
X
0
1
TABLE 7. STATUS REGISTER SR1 CONFIGURATION
CABF OUVF OLF BCF
FUNCTION
X
X
X
X SR1 is selected
X
X
0
X Iout ≤ set limit, normal operation
X
X
1
X Iout > static/dynamic limiting mode/power blocks disabled
X
X
X
0 Iobck ≤ set limit, normal operation
X
X
X
1 Iobck > dynamic limiting mode/power blocks disabled
X
0
X
X Vin/Vout within specified range
X
1
X
X Vin/Vout is not within specified range
0
X
X
X Cable is connected, Io is > 20mA
1
X
X
X Cable is open, Io < 2mA
X
X
X
X T_J ≤ +130°C, normal operation
X
X
X
X T_J > +150°C, power blocks disabled
TABLE 8. TONE REGISTER SR2 CONFIGURATION
SR2H SR2M SR2L ENT MSEL TTH
X
X
FUNCTION
0
0
1
X
X
X
X
X SR2 is selected
0
0
1
0
0
X
X
X Int Tone = 22kHz, modulated by EXTM, T_r, T_f = 10µs typical
0
0
1
0
1
X
X
X Ext 22k modulated input, T_r, T_f = 10µs typical
0
0
1
1
0
X
X
X Int Tone = 22kHz, modulated by ENT bit, T_r, T_f = 10µs typical
0
0
1
X
X
0
X
X TXT = 0; Decoder Rx threshold is set at 200mV maximum
0
0
1
X
X
1
X
X TXT = 0; Decoder Tx threshold is set at 400mV mininum
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
TABLE 9. COMMAND REGISTER SR3 CONFIGURATION
SR3H SR3M SR3L DCL VSPEN X ISELH ISELL
FUNCTION
0
1
0
X
X
X
X
X SR3 is selected
0
1
0
0
X
X
0
0 Iout1 = 275mA maximum
0
1
0
0
X
X
0
1 Iout1 = 515mA maximum
0
1
0
0
X
X
1
0 Iout1 = 635mA maximum
0
1
0
0
X
X
1
1 Iout1 = 800mA maximum
0
1
0
1
X
X
X
X Dynamic current limit NOT selected
0
1
0
0
X
X
X
Dynamic current limit selected
0
1
0
X
0
X
X
X SELVTOP H/W pin enabled
0
1
0
X
1
X
X
X SELVTOP H/W pin disabled
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
12
FN9191.2
December 5, 2008