POWER LP3361 6-channel constant current white led driver Datasheet

Preliminary Datasheet
LP3361
6-Channel Constant Current White LED Driver
General Description
Features
The LP3361 is a low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. It
supports 6 white LEDs with regulated constant current for
uniform intensity. The LP3361 maintains low dropout
current regulators. The LP3361 requires a 45mV dropout
at a 20mA load on each output to match the LED brightness.
The brightness of LEDs can be tuned through a pulse width
modulated signal at the PWM pin,the PWM frequency from
200Hz to 10KHz and the Duty from 0 to 100%.
—
—
—
—
—
—
—
—
—
2.7V to 6V Input Voltage
20mA maxim sink current
Dual Panel Driver of WLED
PWM tuned LED brightness through EN pin
Soft Start Function
Built-in Thermal Protection
IQ<1uA in Shutdown
TDFN-10 Package
RoHS Compliant and 100% Lead (Pb)-Free
The LP3361 is available in a TDFN-10 package.
Typical Application Circuit
Main_Panel
LP3361
VBAT
3
8
LED1
VDD1
LED2
VDD2
LED3
ON/OFF
2
7
LED4
EN2
LED5
Order Information
LP3361 -
EN1
11
GND
LED6
□ □ □
4
5
6
9
10
Sub_Panel
2.2uF
F: Pb-Free
Package Type
QV:TDFN-10
1
Marking Information
Please see website.
Applications
—
—
—
—
LCD Panel
Cellular and Smart mobile phone
PDA/DSC
PMP
LP3361 – Ver. 1.0 Datasheet
Nov.-2008
Page 1 of 6
VBAT
Preliminary Datasheet
LP3361
Application Information
Main_Panel
LP3361
VBAT
3
8
LED1
VDD1
LED2
VDD2
LED3
MAIN_CTRL
2
ON
OFF
7
EN1
LED4
LED5
11
GND
LED6
Main_Panel
LP3361
VBAT
LED1
3
VDD1
4
LED2
8
VDD2
5
LED3
9
Backlight_CTRL
2
EN1
ON
7
EN2
Key Pad_CTRL
11
LED5
10
6
OFF
EN2
SUB_CTRL
VBAT
1
LED4
LED6
GND
VBAT
1
4
2.2uF
5
6
9
KeyPad_LED
10
Sub_Panel
2.2uF
LP3361 Driver Dual Panel Application
5PCS LED
LP3361
VBAT
3
8
LED1
VDD1
LED2
VDD2
LED3
ON/OFF
2
7
EN1
LED4
GND
VBAT
1
LED6
6PCS LED
LP3361
VBAT
3
4
8
5
LED1
VDD1
LED2
VDD2
LED3
ON/OFF
6
2
NC
7
EN2
LED5
11
LP3361 Driver Panel and Keypad WLED Application
9
EN1
LED4
EN2
LED5
10
11
GND
LED6
4
5
6
9
10
2.2uF
2.2uF
LP3361 Driver 5pcs White-LED Application
4PCS LED
LP3361
VBAT
3
NC
8
LED1
VDD1
LED2
VDD2
LED3
ON/OFF
2
NC
7
EN1
LED4
LED5
11
GND
VBAT
1
LP3361
VBAT
3
4
8
5
LED6
LED1
VDD1
LED2
VDD2
LED3
ON/OFF
6
2
9
EN1
LED5
2.2uF
NC
Nov.-2008
LED4
EN2
NC
10
LP3361 Driver 4pcs White-LED Application
LP3361 – Ver. 1.0 Datasheet
LP3361 Driver 6pcs White-LED Application
7
EN2
VBAT
1
11
GND
LED6
1
Flash LED
VBAT
4
5
6
22uF
9
10
EN1
0
0
1
1
EN2
0
1
0
1
ILED
0mA
40mA
80mA
120mA
LP3361 Driver Flash White-LED Application
Page 2 of 6
Preliminary Datasheet
LP3361
Functional Pin Description
P a c k a g e Ty p e
Pin Configurations
LED1
1
EN1
2
10
LED6
9
LED5
8
VDD2
11
VDD1
TDFN-10
3
GND
LED2
4
7
EN2
LED3
5
6
LED4
PIN
NAME
1
LED1
LED1 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
2
EN1
Device enable1 (active high).Control from LED1 to LED4 and used a PWM
dimming brightness.
3
VDD1
LED1~LED4 power supply.
4
LED2
LED2 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
5
LED3
LED3 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
6
LED4
LED4 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
7
EN2
Device enable2 (active high).Control from LED5 to LED6 and used a PWM
dimming brightness.
8
VDD2
LED5,LED6 power supply.
9
LED5
LED2 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
10
LED6
LED2 cathode terminal. 20mA Current flows into LED. Floating is used to disable.
11
GND
Gound.
LP3361 – Ver. 1.0 Datasheet
DESCRIPTION
Nov.-2008
Page 3 of 6
Preliminary Datasheet
Absolute Maximum Ratings
LP3361
—
—
Input Voltage to GND (VDD1, VDD2) ---------------------------------------------------------------------- 6.5V
EN to GND Voltage (VEN) ---------------------------------------------------------------------- -0.3V to Vin+0.3V
—
Operating Junction Temperature Range (TJ) --------------------------------------------------
—
Maximum Soldering Temperature (at leads, 1 0sec) ----------------------------------------------------- 300℃
-40℃ to 125℃
Thermal Information
—
Maximum Power Dissipation (PD) DFN-10 ---------------------------------------------------------------- 1.5W
—
Thermal Resistance (JA) ------------------------------------------------------------------------------------ 58℃/W
Electrical Characteristics
(Over recommended operating conditions unless specified otherwise) VINA =3.6V,EN=High, TA=25℃ )
Parameter
Symbol
Conditions
Min.
3
Input Voltage
Quiescent Current
No Load,
ISHDN
ILED-ERR
Shutdown Current
EN = GND
LED Current Accuracy
3mA< ILED<30mA
19.4
ILED-LED-ERR
LED Channel Matching
Any two channel mismatch
-3
VEN(L)
Enable Threshold Low
VEN(H)
Enable Threshold High
VIN
IQ
LP3361 – Ver. 1.0 Datasheet
Nov.-2008
LP3361
Typ.
Unit
75
Max.
5.5
75
V
uA
0.1
1
µA
20.6
mA
3
%
0.5
V
20
2
V
Page 4 of 6
Preliminary Datasheet
LP3361
Typical Operating Characteristics
LP3361 – Ver. 1.0 Datasheet
Nov.-2008
Page 5 of 6
Preliminary Datasheet
LP3361
Packaging Information
LP3361 – Ver. 1.0 Datasheet
Nov.-2008
Page 6 of 6
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