ISL6422B_15 Datasheet, PDF (16/19 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs

ISL6422B
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interface block will be HIGH, the I²C interface becomes
operative and the SRs can be configured by the main
microprocessor. About 400mV of hysteresis is provided in the
UVLO threshold to avoid false triggering of the Power-On
reset circuit. (I²C comes up with EN = 0; EN goes HIGH at the
same time as (or later than) all other I²C data for that PWM
becomes valid).
ADDRESS Pin
Connecting this pin to GND the chip I²C interface address is
0001000, but, it is possible to choose between four different
addresses simply by setting this pin at one of the four fixed
voltage levels, as shown in Table 19.
TABLE 19. ADDRESS PIN CHARACTERISTICS
V_ADDR
V_ADDR-1
“0001000”
ADDR1
0
ADDR0
0
V_ADDR-2
0
1
“0001001”
V_ADDR-3
1
0
“0001010”
V_ADDR-4
“0001011”
1
1
I²C Electrical Characteristics
PARAMETER
Input Logic High, VIH
Input Logic Low, VIL
Input Logic Current, IIL
Input Hysterisis
SCL Clock Frequency
TABLE 20. I²C SPECIFICATIONS
TEST CONDITION
MIN
SDA, SCL
2.0V
SDA, SCL
SDA, SCL;
0.4V < V_DD< 3.3V
SDA, SCL
165mV
0
I²C Bit Description
BIT NAME
EN1, EN2
VTOP1, VTOP2
VBOT1, VBOT2
ENT1, ENT2
MSEL1, MSEL2
TFR1, TFR2
DCL1, DCL2
VSPEN1, VSPEN2
ISELH1, SELH2 and ISELL1,
ISELL2, ISEL1R, ISEL2R
OTF
CABF1, CABF2
OUVF1, OUVF2
OLF1, OLF2
BCF1, BCF2
TTH1, TTH2
TABLE 21.
DESCRIPTION
ENable output for Channels 1 and 2
Voltage TOP Select ie 18V/19V for Channels 1 and 2
Voltage BOTtom Select, i.e. 13V/14V for Channels 1 and 2
ENable Tone for Channels 1 and 2
Modulation SELect for Channels 1 and 2
Tone Frequency and Rise time select for Channels 1 and 2
Dynamic Current Limit select for Channels 1 and 2
Voltage Select Pin ENable for Channels 1 and 2
Current limit “I” SELect High and Low bits for Channels 1 and 2
Over-Temperature Fault bit
CABle Fault or open status bit for Channels 1 and 2
Over and Undervoltage Fault status bit for Channels 1 and 2
Over Load Fault status bit for Channels 1 and 2
Backward Current Fault bit for Channels 1 and 2
Tone THreshold is the OR of the signal pin TXT1, TXT2
TYP
200mV
100kHz
MAX
0.8V
10A
235mV
400kHz
16
FN6486.2
September 8, 2015