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PDF SC5010H Data sheet ( Hoja de datos )
| Número de pieza | SC5010H | |
| Descripción | High Efficiency 8-Channel LED Driver | |
| Fabricantes | Semtech | |
| Logotipo |  |
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SC5010Hwww.DataSheet.co.kr
POWER MANAGEMENT
High Efficiency 8-Channel LED Driver with
I2C Interface and Phase-Shifted PWM Dimming
Features
Description
VIN Range — 4.5V to 27V, VOUT Range — Up to 50V
Step-up (Boost) Controller
Ultra-Fast Transient Response
Integrated Soft-start
Programmable Switching Frequency
Linear Current Sinks
8 Strings, up to 50mA/String
Current Matching ±1%
Current Accuracy ±2%
PWM Dimming
String-by-String Phase Shifting
Input Dimming Frequency 100Hz-30kHz
User Selectable 9 or 10 Bits Dimming Resolution
Optional Synchronization to VSYNC/HSYNC Signal
Optional External p-MOSFET Disconnect Switch
True Load Disconnect and Inrush Current Limiting
I2C Interface
Fault Status — Open/Short LED, UVLO, OTP
Device Control — SYNC Freq, PLL Setting
Protection Features
Open/Shorted LED(s) and adjustable OVP
Over-Temperature and UVLO Shutdown Protection
4 X 4 X 0.6 (mm) 28-pin QFN Package
The SC5010H is an 8-channel high-precision, high-efficiency
step-up (Boost) LED driver for backlight applications. It fea-
tures wide input voltage range (4.5V to 27V) , flexible output
configuration, wide analog and PWM dimming range,
phase shifting and fading. It also features video signal syn-
chronization (VSYNC), I2C interface, and numerous protec-
tion features. An optional disconnect p-MOSFET provides
true load disconnection and inrush current limiting.
The boost controller, with programmable switching fre-
quency from 200kHz to 2.2MHz, maximizes efficiency by
dynamically minimizing the output voltage while maintain-
ing LED string current accuracy. It provides excellent line
and load response with no external compensation compo-
nents. Each linear current sink is matched within ±1% for
superb lighting uniformity, and the accuracy of each string
current is ±2%. An external resistor adjusts the current from
10-50mA per string. It also features PWM dimming resolu-
tion of 9 or 10 bits (user selectable) over dimming frequency
from 100Hz to 20kHz, synchronized to the SYNC signal or
the boost oscillator. String-by-string phase shifting reduces
the demand on the input/output capacitance, decreases
EMI, and improves dimming linearity.
Applications
Notebook PCs, UMPC, LCD Monitors, and Tablet PCs
SC5010H is available in a low-profile, thermally enhanced,
4 X 4 X 0.6(mm) QFN 28-pin package.
Typical Application Circuit
C2
VIN=4.5 to 27V
Q2
(O p tio n a l)
VCC = 4.5 to 5.5V
R1
R2
C1
FLT
EN
For I2C
SYNC
PWMI
R3
C3
R6 R5
R10
R11
C4 R7
L1
DRVP
V IN
DRVN
CS
SC5010H
UVLO
VCC
OVP
FLT
EN
SDA
SCL
SYNC
PWMI
BG
SCP
FSET
IS E T
CPLL
IO 1
IO 2
IO 3
IO 4
IO 5
IO 6
IO 7
IO 8
AGND
PGND
D1 VOUT up to 50V
Q1
R4
R9
C5
R8
Up to
50m A/CH
Revision 1.0
© 2011 Semtech Corporation
Datasheet pdf - http://www.DataSheet4U.net/
1 page  
www.DataSheet.co.kr
SC5010H
Electrical Characteristics (continued)
Parameter
Current Sink (IO1 to IO8)
IOx Dimming Minimum Pulse Width
ISET pin voltage
Regulation Voltage
Current Sink Disable Threshold
Current Sink Rise/Fall Time (1)
LED Current Accuracy
LED Current Matching (2)
IOn Off Leakage Current
IO Switching Frequency
Phase Delay Time between IO Pins
(IO1 to IO8)
Symbol
TPWM(MIN)
VISET
VIOn(REG)
VIOn(DIS)
tRISE/FALL
IOn(ACC%)
IOn(MATCH)
IOn(LEAK)
FPWM(IO)
tPD
PWM Output Resolution
Fault Protection
LED Short Circuit Protection Threshold
LED Open Circuit Protection Threshold
LED Short Circuit Fault Delay
FLT Pin Leakage Current
FLT Output Low
Over-Temperature Protection
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
VIOn(SCP)
VIO_OCP
tSCP(DELAY)
IFLT(LEAK)
VFLT(LOW)
Conditions
FPWM(LED) = 100Hz - 30kHz
Voltage of Regulating String
Checked at Power-up
Rising edge from 10% to 90% of IO(n)
PWMI = 100%, TA = +25°C
PWMI = 100%, TA = +25 °C
PWMI = 100%, TA = -40 °C to +85 °C
PWMI = 0V, EN = 0V, VIO1 ~ VIO8 = 25V
FAST_FREQ = 0
FAST_FREQ = 1 (Default Setting)
FAST_FREQ = 1 (default setting)
tPD = (1/8)*(1/FPWM(IO)), 8 Strings On
FPWM(IO) = 10kHz
FPWM(IO) = 20kHz
R4 and R5 (3)
VOVP set to 1.5V, FLT goes low
VEN = 0V, VFLT = 5.0V
-5mA from FLT to VCC
Min Typ Max Units
300 ns
1.23 V
0.9 V
0.6 V
25 ns
39.2 40 40.8 mA
±1 %
±2 %
0.1 1
µA
10
kHz
20
6.25 µs
10
bits
9
17xVSCP 20xVSCP 23xVSCP
0.2
1
-1 1
0.3
V
V
µs
µA
V
150 °C
10 °C
Datasheet pdf - http://www.DataSheet4U.net/
5 Page 
www.DataSheet.co.kr
Typical Characteristics (continued)
Synchronization of the LED Dimming to An
External HSYNC Input
HSYNC = 48kHz
VHSYNC
5V/div.
VLX
20V/div.
VIO1
5V/div.
VIO2
5V/div.
Time (10µs/div)
Analog Dimming Transient via I2C
10mA/string to 50mA/string, 6P10S
VSDA
5V/div.
IL
2A/div.
VOUT (ac coupled)
2V/div.
IO_LED (total)
200mA/div.
Time (40µs/div)
VIN Start Up
Output = 6P10S, 50mA/string
VIN
5V/div.
VLX
20V/div.
VOUT
20V/div.
IO_LED (total)
200mA/div.
Time (20ms/div)
SC5010H
Delay Between HSYNC Rising Edge and Turn-
on of LED String 1
VHSYNC
5V/div.
VIO1
5V/div.
Time (400ns/div)
Analog Dimming Transient via I2C
50mA/string to 10mA/string, 6P10S
VSDA
5V/div.
IL
2A/div.
VOUT (ac coupled)
2V/div.
IO_LED (total)
200mA/div.
Time (100µs/div)
VBG vs. Temperature
1.225
1.224
1.223
1.222
1.221
1.220
-40
-20
0 20 40 60
Temperature (°C)
80 100
11
Datasheet pdf - http://www.DataSheet4U.net/
11 Page | ||
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