MAX1573 查看數據表（PDF） - Maxim Integrated
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MAX1573 Datasheet PDF : 9 Pages
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White LED 1x/1.5x Charge Pump in
UCSP and Thin QFN
Typical Operating Characteristics
(VIN = 3.6V, EN1 = EN2 = IN, CIN = C1 = C2 = COUT = 1µF, RSET = 7.50kΩ, TA = +25°C, unless otherwise noted.)
EFFICIENCY (PLEDs/PBATT)
vs. Li+ BATTERY DISCHARGE
100
90
FULL
3/10
80
1/10
70
60
50
4.2 3.9 3.8 3.7 3.6 3.5 3.4 3.0
Li+ BATTERY VOLTAGE, TIME-WEIGHTED (V)
EFFICIENCY (PLEDs/PBATT)
vs. SUPPLY VOLTAGE
100
1/10 3/10
FULL
90
80
70
60
50
3.0 3.2 3.4 3.6 3.8 4.0 4.2
SUPPLY VOLTAGE (V)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
120
100
80
FULL
60
40
3/10
20
1/10
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
SUPPLY VOLTAGE (V)
INPUT RIPPLE vs. SUPPLY VOLTAGE
9
8 FULL
7
6
5
4
3 3/10
2
1/10
1
0
3.0 3.2 3.4 3.6 3.8 4.0 4.2
SUPPLY VOLTAGE (V)
LED CURRENT vs. SUPPLY VOLTAGE
20
19
LED4
LED2
18
17
16
15
LED3
LED1
14
13
12
11
10
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
LED CURRENT vs. TEMPERATURE
17.5
17.4
17.3
17.2
17.1
17.0
16.9
16.8
16.7
16.6
16.5
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80
TEMPERATURE (°C)
LED CURRENT vs. RSET
30
25
20
FULL
15
3/10
10
1/10
5
0
5 6 7 8 9 10 11 12 13 14 15
RSET (kΩ)
TYPICAL OPERATING WAVEFORMS
IN 1x MODE
MAX1573 toc08
TYPICAL OPERATING WAVEFORMS
IN 1.5x MODE
MAX1573 toc09
3.6V Li+ BATTERY INPUT 20mV/
VIN
div
VIN
3.4V Li+ BATTERY INPUT
20mV/
div
10mA/
IIN
div
IIN
10mA/
div
20mV/
VOUT
div VOUT
20mV/
div
500ns/div
500ns/div
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