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PDF RT5006 Data sheet ( Hoja de datos )
| Número de pieza | RT5006 | |
| Descripción | Single Output LNB Power Supply Controller | |
| Fabricantes | Richtek | |
| Logotipo |  |
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®
RT5006
Single Output LNB Power Supply Controller with I2C Interface
General Description
The RT5006 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 Block (LNB) down converter in
the antenna dish or to the multi-switch box.
The device consists of an independent current-mode Boost
controller and a low dropout linear regulator and the circuitry
required for 22kHz tone generation and integrates tone
detection capability, to support full one-way DiSEqCTM
communications.
All the functions and the LNB output voltages (16
programmable levels) can be controlled via the I2C bus.
The RT5006 has fault signal to serve as an interrupt for
the processor when any condition turns off the LNB
controller (over current, over temperature and under voltage
lockout). The states of these flags to the faults can be
thoroughly examined through the I2C registers.
Features
Wide Input Supply Voltage Range : 8V to 16V
Output Current Up to 700mA
Output Current Limit of 800mA with 5ms Timer
LNB Voltages (16 Programmable Levels)
±4.5% High Accuracy of LNB Voltage for 0mA to
500mA Current Output
Fault Latch for OTP, OCP, UVLO
Built-in 22kHz Tone Generator One-Way DiSEqCTM
Communication
Four Methods of 22kHz Tone Generation, via I2C
Data Bits and/or External Pin
Adjustable Rising/Falling Time via External
Capacitor
2-Wire Serial I2C Compatible Interface
RoHS Compliant and Halogen Free
Applications
LNB Power Supply and Control for Satellite Set-Top Box
Analog and Digital Satellite Receivers/ Satellite TV,
Satellite PC cards
Simplified Application Circuit
VIN
VDD
From
MCU
L1
C1
C2
C3
VA
R1 R2 R3
D1
LX
VIN BOOST
VREG
RT5006
ADD
LNB
EXTM
SDA
SCL
IRQ
PGND
TCAP
GND
L2
C4
D3
C5
D2 C7
LNB
Power
D4
C6
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5006-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
1
1 page  
RT5006
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 28V
Output Voltage LNB, LX and BOOST Pins -------------------------------------------------------------------------- −0.3V to 28V
Other Pins ------------------------------------------------------------------------------------------------------------------ −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WQFN-20L 4x4 ------------------------------------------------------------------------------------------------------------ 3.46W
WQFN-28L 5x5 ------------------------------------------------------------------------------------------------------------ 3.57W
Package Thermal Resistance (Note 2)
WQFN-20L 4x4, θJA ------------------------------------------------------------------------------------------------------- 28.8°C/W
WQFN-20L 4x4, θJC ------------------------------------------------------------------------------------------------------ 7.2°C/W
WQFN-28L 5x5, θJA ------------------------------------------------------------------------------------------------------- 28°C/W
WQFN-28L 5x5, θJC ------------------------------------------------------------------------------------------------------ 7°C/W
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Supply Input Voltage (Note 5) ---------------------------------------------------------------------------------------- 8V to 16V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = 12V, VLOAD, ILOAD is the output of LNB power, TA = 25°C, unless otherwise specified)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
LNB Output Accuracy,
Load and Line Regulation
Supply Current
Boost Switch On
Resistance
ER R
IIN_ OFF
IIN_ ON
RDSON
Relative to selected VLNB target level,
ILOAD = 0 to 500mA
ENB bit = 0, LNB output disabled
ENB bit = 1, LNB output enabled,
ILOAD = 0mA
4.5
--
--
--
--
--
4.5 %
10
mA
19
-- 300 600 m
Switching Frequency
fSW
320 352 384 kHz
Switch Current Limit
ILIM SW
VIN = 10V, VBOOST = 20.4V
-- 3.8 --
A
Linear Regulator Voltage
Drop
VREG output
VD ROP
VR EG
VBOOST VLNB, no tone signal,
ILOAD = 500mA
600 800 1000 mV
-- 5 -- V
TCAP Pin Current
ICHG
IDISCHG
VTCAP = 0V
VTCAP = 4V
12.5 10
7.5 10
7.5
12.5
A
Ripple and Noise on LNB
Output
VR IP_ PP
20MHz Bandwidth Limit
-- 30 -- mVPP
Load Regulation
VOUT_LOAD VLNB = 13.709V, ILNB = 50mA to 450mA
VLNB = 19.042V, ILNB = 50mA to 450mA
--
--
38 76
mV
45 90
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5006-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
5
5 Page 
RT5006
Option 3 External Tone Control by TGATE
Option 4 External Tone Control by TGATE
VLNB
(0.2V/Div)
13V
VLNB
(0.2V/Div)
13V
EXTM
(5V/Div)
SDA
(5V/Div)
VIN = 12V, TMODE = 0, TGATE is Controlled by I2C
Time (100μs/Div)
EXTM
(2V/Div)
VIN = 12V, TGATE = 1, TMODE = 0
Time (100μs/Div)
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS5006-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet RT5006.PDF ] | |
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