|
|
PDF RT9367C Data sheet ( Hoja de datos )
| Número de pieza | RT9367C | |
| Descripción | I2C Programmable White LED Driver | |
| Fabricantes | Richtek | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RT9367C (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
|
No Preview Available !
RT9367C
I2C Programmable White LED Driver with Dual LDO
General Description
The RT9367C is an integrated solution for backlighting
and phone camera input supply. The part contains a charge
pump white LED driver and dual low dropout linear
regulators. This IC can be shutdown by pulling ENA low.
In the section of charge pump, The RT9367C can power
up 4 white LEDs with regulated constant current for uniform
intensity. Each channel (LED1-LED4) can support up to
25mA. The part maintains highest efficiency by utilizing
a x1/x1.5/x2 fractional charge pump and low dropout
current regulators. An internal 5-bit DAC is used for
brightness control. Users can easily configure up to 32-
step of LED current by I2C interface.
In the section of linear regulator, The RT9367C comprises
a dual channel, low noise, and low dropout regulator
sourcing up to 300mA at each channel. The range of output
voltage can be configured from 1.1V to 3.3V by I2C
interface. The outputs of LDO offer 3% accuracy and low
dropout voltage of 250mV @300mA. The LDO also
provides current limiting and output short circuit thermal
folded back protection.
Ordering Information
RT9367C
Package Type
QW : WQFN-20L 3x3 (W-Type)
Note :
Lead Plating System
G : Green (Halogen Free and Pb Free)
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Richtek products are :
` RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
` Suitable for use in SnPb or Pb-free soldering processes.
DS9367C-01 March 2011
Features
An Integrated Solution for Backlighting and Phone
Camera Input Supply
I2C Programmable, 32 Steps Dimming Control and
Independent Channel On/Off Control
Over Temperature Protection
Power On Reset for Data Register
Typical 1uA Low Shutdown Current with Interface
Fully On
Charge Pump White LED Driver
` Over 93% Peak Efficiency Over Li-ion Battery
Discharge
` Typical 85% Average Efficiency Over Li-ion Battery
Discharge
` Support Up to 4 White LEDs
` Output Current Up to 25mA/Channel 100mA Total
` 60mV Typical Current Source Dropout
` 1% Typical LED Current Accuracy
` 0.7% Typical LED Current Matching
` Automatic x1/x1.5/x2 Charge Pump Mode
Transition
` Low Input Noise and EMI Charge Pump
` 5.5V Over Voltage Protection
` Power On/Mode Transition In-rush Protection
` 1MHz Random Frequency Oscillator
` Typical 0.1uA Low Shutdown Current
Dual LDO
` Wide Operating Voltage Range
` Low-Noise Output
` No Noise Bypass Capacitor Required
` Fast Response in Line/Load Transient
` Low Temperature Coefficient
` Dual LDO Outputs (300mA/300mA)
` 3% Max Output Accuracy
` Current Limit Protection
` Short Circuit Thermal Folded Back Protection
` Typical 0.1uA Low Shutdown Current
RoHS Compliant and Halogen Free
Applications
Camera Phone, Smart Phone
White LED Backlighting, CMOS Sensor Input Supply
www.richtek.com
1
Free Datasheet http://www.datasheet4u.com/
1 page  
RT9367C
Absolute Maximum Ratings (Note 1)
Supply Input Voltage, AVIN, PVIN ---------------------------------------------------------------------------------------- −0.3V to 6V
Output Voltage, VOUT ------------------------------------------------------------------------------------------------------ −0.3V to 6V
Other Pins ---------------------------------------------------------------------------------------------------------------------- −0.3V to 6V
Power Dissipation, PD @ TA = 25°C
WQFN-20L 3x3 --------------------------------------------------------------------------------------------------------------- 1.471W
Package Thermal Resistance (Note 2)
WQFN-20L 3x3, θJA ---------------------------------------------------------------------------------------------------------- 68°C/W
WQFN-20L 3x3, θJC --------------------------------------------------------------------------------------------------------- 7.5°C/W
Junction Temperature -------------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ---------------------------------------------------------------------------------- 260°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ------------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) --------------------------------------------------------------------------------------------------------- 200V
Recommended Operating Conditions (Note 4)
Junction Temperature Range ---------------------------------------------------------------------------------------------- −40°C to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(VIN = AVIN = PVIN = 3.6V, CIN1 = 2.2uF, CIN2 = 1uF, COUT = 1uF, CFLY1 = CFLY2 = 1uF, VF = 3.5V, ILED1 = ILED2= ILED3 = ILED4 =
15mA, TA = 25°C, unless otherwise specification)
Parameter
Symbol
Conditions
Min Typ Max Unit
Input Power Supply
Input Supply Voltage
Shutdown Current
VIN
ISHDN
VIN = 5V, ENA = 0V
2.8 -- 5.5 V
-- 1 7 μA
Charge Pump LED Driver Block
Under-Voltage Lockout Threshold
Under-Voltage Lockout Hysteresis
VIN Rising.
1.8 2.0 2.5
V
-- 100 -- mV
Quiescent of x1 Mode
Quiescent of x2 Mode
IQ_x1
IQ_x2
-- 1 2.5 mA
-- 3.5 7 mA
LED Current
ILEDX Accuracy
Current Matching
Oscillator Frequency
ILED-ERR
fOSC
ILEDX = 15mA
ILEDX = 15mA
−8 0 +8
−5 0 +5
-- 1000 --
%
%
kHz
Mode Decision
x1 Mode to x2 Mode
Transition Voltage
Mode Transition Hystersis
VTS_x2
VIN Falling
-- 3.65 3.8
V
-- 250 -- mV
To be continued
DS9367C-01 March 2011
www.richtek.com
5
Free Datasheet http://www.datasheet4u.com/
5 Page 
RT9367C
LDO1 Output Voltage vs. I2C Code
3.5
3.0
2.5
ST = 85°C
T = 25°C
2.0 T = −40°C
1.5
1.0
0.5
0.0
00 03 06 09 0C 0F 12 15 18 1B 1E
I2C Code
3.312
3.310
LDO Output Voltage vs. Load Current
VIN = 5V
3.308
3.306
3.304
LDO1
LDO2
3.302
3.300
3.298
0
50 100 150 200 250 300
Load Current (mA)
LDO1 Dropout Voltage vs. Load Current
300
VLDO1 = 3.3V
250
200
150
T = 85°C
100
T = 25°C
T = -40°C
50
0
0 50 100 150 200 250 300
Load Current (mA)
DS9367C-01 March 2011
LDO2 Output Voltage vs. I2C Code
3.5
3.0
ST = 85°C
2.5 T = 25°C
T = −40°C
2.0
1.5
1.0
0.5
0.0
00 03 06 09 0C 0F 12 15 18 1B 1E
I2C Code
3.320
3.315
LDO Output Voltage vs. Temperature
VIN = 5V, ILOAD = 1mA
3.310
3.305
3.300
3.295
LDO1
LDO2
3.290
3.285
3.280
3.275
-50
-25
0 25 50 75
Temperature (°C)
100 125
LDO2 Dropout Voltage vs. Load Current
300
VLDO2 = 3.3V
250
200
150
T = 85°C
100 T = 25°C
T = -40°C
50
0
0 50 100 150 200 250 300
Load Current (mA)
www.richtek.com
11
Free Datasheet http://www.datasheet4u.com/
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet RT9367C.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RT9367C | I2C Programmable White LED Driver | Richtek |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |