ISL6422.pdf 데이터시트 (총 19 페이지) - 파일 다운로드 ISL6422 데이타시트 다운로드

No Preview Available !

®
Data Sheet
April 10, 2007
ISL6422
FN9190.1
Dual Output LNB Supply and Control
Voltage Regulator with I2C Interface for
Advanced Satellite Set-Top Box Designs
The ISL6422 is a highly integrated voltage regulator and
interface IC, specifically designed for supplying power and
control signals from advanced satellite set-top box (STB)
modules to the low noise blocks (LNBs) of two antenna
ports. The device is consists of two independent
current-mode boost PWMs and two low-noise linear
regulators along with the circuitry required for 22kHz tone
generation, modulation and I2C device interface. The device
makes the total LNB supply design simple, efficient and
compact with low external component count.
Two independent current-mode boost converters provide the
linear regulators with input voltages that are set to the final
output voltages, plus typically 0.8V to insure minimum power
dissipation across each linear regulator. This maintains
constant voltage drops across each linear pass element
while permitting adequate voltage range for tone injection.
The final regulated output voltages are available at two
output terminals to support simultaneous operation of two
antenna ports for dual tuners. The outputs for each PWM
can be controlled in two ways:
• Full control from I2C using the VTOP1, VTOP2, VBOT1,
and VBOT12 bits, or
• Set the I2C to the lower range (13V/14V) and switch to the
higher range (18V/19V) with the SELVTOP1 or
SELVTOP2 pin.
All the functions on this IC are controlled via the I2C bus by
writing 8-bit words onto the System Registers (SR). The
same register can be read back, and four bits per output will
report the diagnostic status. Separate enable commands sent
on the I2C bus provide independent standby mode control for
each PWM and linear combination, disabling the output into
shutdown mode. Each output channel is capable of providing
750mA of continuous current. The overcurrent limit can be
digitally programmed.
The External modulation input EXTM1/2 can accept a
modulated Diseqc command and transfer it symmetrically to
the output. Alternatively, the EXTM1 or EXTM2 pin can be
used to modulate the continuous internal tone.
The FLT pin serves as an interrupt for the processor when
an over temperature, overcurrent or backwards overcurrent
fault conditions is detected by the LNB controller or when
both channels are disabled by the I2C EN bits set low. The
nature of the fault can be read of the I2C registers.
Features
• Single Chip Power Solution
- True Dual Operation for 2-Tuner/2-Dish Applications
- Both Outputs May be Enabled Simultaneously at
Maximum Power
- Integrated DC/DC Converter and I2C Interface
• Switch-Mode Power Converter for Lowest Dissipation
- Boost PWMs with >92% Efficiency
- Selectable 13.3V or 18.3V Outputs
- Digital Cable Length Compensation (1V)
- I2C and Pin controllable output
• Output Back Bias Capability of 28V
• I2C Compatible Interface for Remote Device Control
• Four level Slave Address 0001 00XX
• 2.5V, 3.3V, 5V Logic Compatible
• External Pins to Toggle between V and H Polarization.
• Supports DiSEqC 2.0 Protocol
• Built-In Tone Oscillator Factory Trimmed to 22kHz
- Facilitates DiSEqC (EUTELSAT) Encoding
- External Modulation Input
• Internal Over-Temperature Protection and Diagnostics
• Internal OV, UV, Overload and Overtemp Flags
(Visible on I2C)
• FLT Signal
• LNB Short-Circuit Protection and Diagnostics
• QFN, EPTSSOP Packages
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• LNB Power Supply and Control for Satellite Set-Top Box
Ordering Information
PART NUMBER PART
(Note)
MARKING
TEMP.
RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL6422ERZ ISL6422ERZ -20 to +85 40 Ld 6x6 QFN L40.6x6
ISL6422ERZ-T ISL6422ERZ -20 to +85 40 Ld 6x6 QFN L40.6x6
(Tape and Reel)
ISL6422EVEZ ISL6422EVEZ -20 to+ 85 38 Ld EPTSSOP M38.173B
ISL6422EVEZ-T ISL6422EVEZ -20 to +85 38 Ld EPTSSOP M38.173B
(Tape and Reel)
NOTE: Intersil Pb-free plus anneal products employ special Pb-free
material sets; molding compounds/die attach materials and 100% matte
tin plate termination finish, which are RoHS compliant and compatible with
both SnPb and Pb-free soldering operations. Intersil Pb-free products are
MSL classified at Pb-free peak reflow temperatures that meet or exceed
the Pb-free requirements of IPC/JEDEC J STD-020.
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006, 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.

No Preview Available !

Pinouts
ISL6422
(40 LD QFN)
TOP VIEW
ISL6422
40 39 38 37 36 35 34 33 32 31
EXTM2 1
SGND 2
NC 3
FLT 4
SDA 5
SCL 6
ADDR0 7
ADDR1 8
EXTM1 9
BYP 10
ISL6422ERZ
30 VOUT2
29 TDIN2
28 TDOUT2
27 CPVOUT
26 CPSWOUT
25 CPSWIN
24 VCC
23 TDOUT1
22 TDIN1
21 VOUT1
11 12 13 14 15 16 17 18 19 20
ISL6422
(38 LD EPTSSOP)
TOP VIEW
CS2 1
VSW2 2
VSW2 3
GATE2 4
PGND2 5
EXTM2 6
SGND 7
FLT 8
SDA 9
SCL 10
ADDR0 11
ADDR1 12
EXTM1 13
BYP 14
PGND1 15
GATE1 16
VSW1 17
VSW1 18
CS1 19
ISL6422EVEZ
38 TXT2
37 SELVTOP2
36 TCAP2
35 NC
34 VOUT2
33 TDIN2
32 TDOUT2
31 CPVOUT
30 CPSWOUT
29 CPSWIN
28 VCC
27 TDOUT1
26 TDIN1
25 VOUT1
24 AGND
23 TCAP1
22 SELVTOP1
21 NC
20 TXT1
2 FN9190.1
April 10, 2007

No Preview Available !

Block Diagram
17
56
8
4
7
COUNTER
OVERCURRENT
PROTECTION
LOGIC SCHEME 1
OLF1
DCL1
SELVTOP1
OLF2
DCL2
OVERCURRENT
PROTECTION
LOGIC SCHEME 2
COUNTER
12 GATE1
PGND1
11
PWM
LOGIC
Q
S
CLK1
OC1
CS1
15
CS ILIM1
AMP
SLOPE
COMPENSATION
TDOUT1
23
TONE
DECODER
22 TDIN1
TXT1
VREF1
14 VSW1
20, 21
19
VOUT1
AGND
24 VCC
ON CHIP
LINEAR
UVLO
SGND
POR
2 SOFT-START
INT 5V
SOFT-START
EN1/EN2
BAND GAP
REF VOLTAGE
REF
VOLTAGE
ADJ1
OC2
SDA SCL ADDR1
ADDR0 OUVF2
OUVF11
ISEL1L AND
ISEL1H
EN1
ENT1
OLF1 FLT OLF2
I2C
INTERFACE
ISEL2L AND
ISEL2H
EN2
ENT2
OTF
VTOP1 VBOT1
DCL
VBOT2 VTOP2
CLK2
PWM
LOGIC
Q
S
GATE2
PGND2
ILIM2 CS
AMP
SLOPE
COMPENSATION
CS2
BGV
CLK1 OSC. CLK2
1.1MHz
DIV AND
WAVE SHAPING
TONE
INJ
CKT 1
INT
TONE
TONE
INJ
CKT 2
BGV
REF
VOLTAGE
ADJ2
VREF2
SELVTOP2
VSW2
+
-
EXT TONE CKT
VOUT2
+
-
TDOUT2
ENT1
ENT2
TONE
DECODER
TDIN2
OTF
THERMAL
SHUTDOWN
CHARGE PUMP CPSWIN
CPVOUT CPSWOUT
39
40
36
34
37
30, 31
28
29
25
NOTE:
10
1. Pinouts shown are for the QFN package.
16
18 9 1 33 35
27 26

No Preview Available !

Typical Application Schematic QFN
2
L1
PRELIMINARY15uH
C5
56uF
0
D6 CMS06
D1
CMS06
L4 4.7uH
L5 220uH
1 12
12
0
VIN
RTN
FLT BAR
SELVTOP2
TXT2
C3
56uF
0
R4
18
C10
10UF
0
TPC6002
Q3
R3
470
C11
C12
10uF 10uF
00
0
0
C19
0.22uF
C23
10n
C25 0.22uF
R7 15
C27
0.1uF
0
D4
CMS06
0
C21
0.1uF
0
R25
R14 4.7K 10K
M7
NDS356AP
VLNB2
D7
1.5KE24
RTN
0
C6
56uF
0
2
L2
15uH
1
R1 C1
0.1 100PF
0
0
R6
18
TPC6002
Q4
R5
470
R2
0.1 C2
100PF
00
1
2
3
4
EXTM2
SGND
NC
5
6
FLT
SDA
7 SCL
8
9
10
ADDR0
ADDR1
EXTM1
BYP
U1
ISL6422ER
VOUT2
TDIN2
TDOUT2
CPVOUT
CPSWOUT
CPSWIN
VCC
TDOUT1
TDIN1
VOUT1
30
29
28
27
26
25
24
23
22
21
0
1uF
C8
0
0
C20
0.22uF
00
R24
47K
Q6
2N2222A
C29
1.5n
C17
1uF
0
0
L6
1
220uH
2
C26 0.22uF
R8 15
0
C24
10n
C28
0.1uF
0
D3
CMS06
0
C22
0.1UF
0
0
C16
1uF
R23
R13 4.7K 10K
M6
NDS356AP
VLNB1
D8
1.5KE24
RTN
0
R22
47K
0
Q5
2N2222A
0
TDOUT2
D2
CMS06
TXT1
SDA
SCL
L3 4.7uH
12
D5 CMS06
EXTM1
SELVTOP1
C4
56uF
C13
10uF
C14
10uF
C15
10uF
EXTM2
00
00
R10
CONFIDENTIALR11
100
100
TDOUT1

No Preview Available !

ISL6422
Absolute Maximum Ratings
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 8.0V to 18.0V
Logic Input Voltage Range
(SDA, SCL, ENT, DSQIN1 and DSQIN2,
SEL18V1 and SEL18V2) . . . . . . . . . . . . . . . . . . . . . . -0.5V to 7V
Thermal Information
Thermal Resistance (Typical, Notes 2, 3) θJA (°C/W) θJC (°C/W)
EPTSSOP Package . . . . . . . . . . . . . . .
29
4
QFN Package. . . . . . . . . . . . . . . . . . . .
34
6
Maximum Junction Temperature (Note 4) . . . . . . . . . . . . . . . +150°C
Maximum Storage Temperature Range . . . . . . . . . . -40°C to +150°C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . +300°C
(SOIC - Lead Tips Only)
Operating Temperature Range . . . . . . . . . . . . . . . . . -20°C to +85°C
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the
device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
+150°C max junction temperature is intended for short periods of time to prevent shortening the lifetime. Operation close to +150°C junction may trigger the shutdown of
the device even before +150°C, since this number is specified as typical.
NOTES:
2. θJA is measured in free air with the component mounted on a high effective thermal conductivity test board with “direct attach” features. See
Tech Brief TB379.
3. For θJC, the "case temp" location is the center of the exposed metal pad on the package underside.
4. The device junction temperature should be kept below +150°C. Thermal shut-down circuitry turns off the device if junction temperature exceeds
+150°C typically.
Electrical Specifications
VCC = 12V, TA = -20°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C. EN1 = EN2 = H,
VTOP1 = VTOP2 = L, ENT1 =
noted. See “ISL6422 Software
ENT2 = L, DCL
Description” on
= L, DSQIN1 = DSQIN2 =
page 12 for I2C access to
L, IOUT = 12mA,
the system.
unless
otherwise
PARAMETER
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNITS
Operating Supply Voltage Range
8 12 14
V
Standby Supply Current
EN1 = EN2 = L
1.5 3.0
mA
Supply Current
IIN EN1 = EN2 = VTOP1 = VTOP2 = VBOT1 =
VBOT2 = ENT1 = ENT2 = H, No Load
4.0 8.0
mA
UNDERVOLTAGE LOCKOUT
Start Threshold
7.5 7.95 V
Stop Threshold
7.0 7.55 V
Start to Stop Hysteresis
350 400 500
mV
SOFT-START
COMP Rise Time (Note 5)
(Note 5)
8196
Cycles
Output Voltage (Note 5)
Line Regulation
Load Regulation
VOUT1
VOUT1
VOUT1
VOUT1
VOUT2
VOUT2
VOUT2
VOUT2
DVOUT1,
DVOUT2
DVOUT1,
DVOUT2
(Refer to Table 11)
(Refer to Table 11)
(Refer to Table 11)
(Refer to Table 11)
(Refer to Table 15)
(Refer to Table 15)
(Refer to Table 15)
(Refer to Table 15)
VIN = 8V to 14V; VOUT1, VOUT2 = 13V
VIN = 8V to 14V; VOUT1, VOUT2 = 18V
IO = 12mA to 350mA
IO = 12mA to 750mA
13.04 13.3 13.56
14.02 14.3 14.58
17.94 18.3 18.66
19.00 19.3 19.68
13.04 13.3 13.56
14.02 14.3 14.58
17.94 18.3 18.66
19.00 19.3 19.68
4.0 40.0
4.0 60.0
50 80
100 200
V
V
V
V
V
V
V
V
mV
mV
mV
mV
5 FN9190.1
April 10, 2007