MP1529 View Datasheet(PDF) - Monolithic Power Systems
Part Name
Description
Manufacturer
MP1529 Datasheet PDF : 11 Pages
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TM
MP1529 – FIXED FREQUENCY STEP-UP CONVERTER LCD BACKLIGHT PLUS FLASH
TYPICAL PERFORMANCE CHARACTERISTICS
Circuit of Figure 2, VIN = 3.6V, 3 LEDs on LED1, 3 LEDs on LED2, 3 LEDs on LED3,
ILED_BL = 20mA, ILED_PV = 40mA, ILED_FL = 100mA, unless otherwise noted.
Efficiency vs. LED Current
Backlight Mode,
1 String of 3 LEDs
85
VIN=4.2V
Efficiency vs. LED Current
Backlight Mode,
1 String of 4 LEDs
85
VIN=3.6V
Efficiency vs. LED Current
Backlight Mode,
1 String of 6 LEDs
85
80
VIN=2.7V
75
70
VIN=3.6V
65
0
5 10 15 20 25
ILED_BL(mA)
MP1529-TPC01
80
75
VIN=2.7V VIN=4.2V
70
65
0
5 10 15 20 25
ILED_BL (mA)
MP1529-TPC02
80
75
VIN=3.6V VIN=4.2V
VIN=2.7V
70
65
0
5 10 15 20 25
ILED_BL (mA)
MP1529-TPC03
Efficiency vs. VIN
Flash Mode
95
90
3 LEDs
85
80
4 LEDs
75
2.5
3.0 3.5 4.0 4.5
VIN (V)
MP1529-TPC04
LED Current Setting
Backlight Mode
35
30
25
20
15
10
5
0
0 100 200 300 400 500 600 700
MP1529-TPC05
LED Current vs. VIN
120
100
Flash Mode
80
60
40
20
0
2.5
Preview Mode
Backlight Mode
3.0 3.5 4.0 4.5
VIN (V)
MP1529-TPC06
Current Matching
LED1 vs. LED2
22
LED1
20
18
LED2
16
14
12
2.5
3.0 3.5 4.0 4.5
VIN (V)
MP1529-TPC07
ILED_BL vs. PWM Dimming
Duty Cycle
25
20
15
10
5
0
20 40 60 80 100
DUTY CYCLE (%)
MP1529-TPC08
MP1529 Rev. 1.0
www.MonolithicPower.com
4
11/23/2005
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