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PDF EUP3651 Data sheet ( Hoja de datos )
| Número de pieza | EUP3651 | |
| Descripción | 1X/1.5X Charge Pump White LED Driver | |
| Fabricantes | Eutech Microelectronics | |
| Logotipo |  |
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EUP3651
4-Channel, 1X/1.5X Charge Pump
White LED Driver
DESCRIPTION
The EUP3651 is a high efficiency charge pump white
LED driver. It supports 4 white LEDs with regulated
constant current for uniform intensity. The EUP3651
maintains the highest efficiency by utilizing a 1.5X
fractional charge pump and low dropout current
regulators. A low external parts count (two 1uF flying
capacitors and two small 1uF capacitors at VIN and
VOUT) makes the EUP3651 ideally suited for small
battery-powered applications.
The EN logic input is used to enable, disable, and set
current with a 16-step linear scale.The LED current can
be configured between 5mA and 25mA. If EN is kept
low for more than 1.5ms, the EUP3651 enters shutdown
mode.
The EUP3651 is available in a 12-pin 3mm x 3mm
TDFN package.
FEATURES
z 1X/1.5X Mode for Ultra-High Efficiency
z Up to 25mA Output Current for Each Channel
z 2.7V to 5.5V Input Voltage
z 1MHz Fixed Switching Frequency
z Single-Wire Serial Pulse Interface to Set LED
Current with 16-step Linear scale
z Soft Start Function
z Built-In Short-Circuit Protection
z Built-in Thermal Protection
z IQ<1uA in Shutdown
z TDFN-12 Package
z RoHS Compliant and 100% Lead (Pb)-Free
APPLICATIONS
z Mobile phone
z Small LCD Backlighting
z Programmable Current Sinks
z White Photo Flash for Digital Cameras
Typical Application Circuit
DS3651 Ver1.0 Feb. 2008
Figure 1.
1
1 page  
Absolute Maximum Ratings
EUP3651
Input Voltage (VIN) ----------------------------------------------------------- -0.3V to +6V
EN/SET to GND Voltage (VEN/SET) ---------------------------------- -0.3V to VIN +0.3V
Maximum DC Output Current (IOUT) ----------------------------------------------- 150mA
Operating Junction Temperature Range (TJ) ------------------------------- -40°C to +150°C
Maximum Soldering Temperature (at leads, 10 sec) ------------------------------- 300°C
Operating Ratings
Maximum Power Dissipation (PD) ------------------------------------------------------- 2W
Operating Temperature ) --------------------------------------------------------- 50°C/W
Electrical Characteristics
(Over recommended operating conditions unless specified otherwise) VIN = 3.6V, EN = High, TAMB = 25 .
Symbol
Parameter
Conditions
EUP3651
Min Typ Max
VIN Operating Voltage
3 5.5
IQ Quiescent Current
1X mode, no load
1.5X mode, no load
0.65 1
2 2.5
ISD Shutdown Current
VEN = 0V
1
ILED-ERR LED Current Accuracy
EN Falling Edges = 1
22.5 25 27.5
ILED-LED-ERR LED Channel Matching
ROUT Output Resistance (open loop)
Any two channel mismatch -3
3
1X mode, IOUT = 100mA
1.75
1.5X mode, IOUT = 100mA
4
FOSC Charge Pump Frequency
1.5X mode
0.75 1 1.25
ISC Output short Circuit Current Limit VOUT < 0.5V
250
VHYS 1.5X to 1X Transition Hysteresis
400
TDLY Transition Filter Delay
500
TSD Thermal Shutdown
160
THYS Thermal Hysteresis
20
IEN EN Input Leakage
-1 1
VHI EN Logic High Level
1.6
VLO EN Logic Low Level
0.4
TSETUP EN setup from shutdown
10
TLO EN program low time
0.5 100
THI EN program high time
0.5 100
TOFF EN low time to shutdown
1.5
TDATADLY EN Delay to DATA
500 1000
Units
V
mA
mA
µA
mA
%
Ω
Ω
MHz
mA
mV
µs
µA
V
V
µs
µs
µs
ms
µs
DS3651 Ver1.0 Feb. 2008
5
5 Page 
Packaging Information
TDFN-12
EUP3651
SYMBOLS
A
A1
b
E
D
D1
E1
e
L
MILLIMETERS
MIN.
MAX.
0.70 0.80
0.00 0.05
0.18 0.30
2.90 3.10
2.90 3.10
2.40
1.70
0.45
0.30 0.50
INCHES
MIN.
MAX.
0.028
0.031
0.000
0.002
0.007
0.012
0.114
0.122
0.114
0.122
0.094
0.067
0.018
0.012
0.020
DS3651 Ver1.0 Feb. 2008
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet EUP3651.PDF ] | |
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