ISL6405 Datasheet, PDF (3/13 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-top Box Designs

Block Diagram
COUNTER
10
GATE1
OVERCURRENT
PROTECTION
LOGIC SCHEME 1
OLF1
DCL
PWM
LOGIC
Q
S
CLK1
OC1
PGND1
9
CS ILIM1
AMP
CS1
11
∑
13
COMP1
SLOPE
COMPENSATION
FB1
12
VREF1
14
VSW1
20
VO1
15
16
17
OLF2
DCL
OVERCURRENT
PROTECTION
LOGIC SCHEME 2
COUNTER
OC2
CLK2
PWM
LOGIC
Q
S
GATE2
4
SDA
ADDR SCL
PGND2
5
ISEL1
EN1
ENT1
OLF
I²C
INTERFACE
ISEL2
EN2
ENT2
ILIM2 _CS
AMP
∑
CS2
6
OTF
LLC1 VSEL1
DCL
VSEL2 LLC2
SLOPE
COMPENSATION
BAND GAP
REF VOLTAGE
REF
VOLTAGE
ADJ1
BGV
CLK1
OSC. _CLK2
220kHz
÷ 10 &
WAVE SHAPING
TONE
INJ
CKT 1
22kHz
TONE
TONE
INJ
CKT 2
BGV
REF
VOLTAGE
ADJ2
VREF2
COMP2
2
FB2
3
VSW2
1
+
VO2
22
+
-
-
ENT2
28
VCC
ON CHIP
LINEAR
UVLO
SGND
POR
7
SOFT-START
INT 5V
SOFT-START
EN1/EN2
8
ENT1
CPVOUT
27
OTF
THERMAL
SHUTDOWN
CPSWIN
CHARGE PUMP
26
CPSWOUT
21
18
19
23
24
25