Typical operating characteristics (continued) – Rainbow Electronics MAX8645Y User Manual
Page 5
MAX8645X/MAX8645Y
1x/1.5x/2x White LED Charge Pumps with
Two LDOs in 4mm x 4mm TQFN
_______________________________________________________________________________________
5
BATTERY CURRENT vs. SUPPLY
VOLTAGE DRIVING FLASH
MAX8645Y toc04
SUPPLY VOLTAGE (V)
BATTERY CURRENT (mA)
3.9
3.6
3.3
3.0
100
200
300
400
500
600
700
800
900
0
2.7
4.2
I
FLASH
= 400mA
I
FLASH
= 160mA
I
FLASH
= 80mA
LDO GROUND-PIN SUPPLY
CURRENT vs. SUPPLY VOLTAGE
MAX8645Y toc05
SUPPLY VOLTAGE (V)
GROUND-PIN SUPPLY CURRENT (
μ
A)
5.1
4.7
3.9
4.3
3.5
3.1
90
100
110
120
130
140
150
160
80
2.7
5.5
V
ENM_
= V
ENF
= 0V, V
ENLDO
= V
IN
150mA, BOTH LDOs
NO LOAD, BOTH LDOs
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH SIX MAIN LEDs
MAX8645Y toc06
SUPPLY VOLTAGE (V)
INPUT RIPPLE (mV
RMS
)
5.1
4.7
4.3
3.9
3.5
3.1
0.3
0.6
0.9
1.2
1.5
1.8
0
2.7
5.5
I
LED
= 15mA
I
LED
= 4.5mA
I
LED
= 1.5mA
INPUT RIPPLE VOLTAGE vs. SUPPLY
VOLTAGE WITH FLASH AND MAIN LEDs
MAX8645Y toc07
SUPPLY VOLTAGE (V)
INPUT RIPPLE (mV
RMS
)
5.1
4.7
3.1
3.5
3.9
4.3
1
2
3
4
5
7
9
6
8
10
0
2.7
5.5
FOUR MAIN LEDs AT 15mA EACH
I
FLASH
= 40mA
I
FLASH
= 160mA
I
FLASH
= 400mA
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH SIX MAIN LEDs
MAX8645Y toc08
SUPPLY VOLTAGE (V)
MAIN LED CURRENT (mA)
5.1
4.7
3.9
4.3
3.5
3.1
14.2
14.4
14.6
14.8
15.0
15.2
15.4
15.6
15.8
16.0
14.0
2.7
5.5
LED CURRENT MATCHING vs. SUPPLY
VOLTAGE WITH TWO FLASH LEDs
MAX8645Y toc09
SUPPLY VOLTAGE (V)
FLASH LED CURRENT (mA)
5.1
4.7
4.3
3.9
3.5
3.1
99.0
98.5
99.5
100.0
100.5
101.0
101.5
102.0
98.0
2.7
5.5
LED CURRENT vs. AMBIENT
TEMPERATURE WITH SIX MAIN LEDs
MAX8645Y toc10
T
A
(
°C)
TOTAL LED CURRENT (mA)
60
35
10
-15
15
30
45
60
75
90
105
0
-40
85
LED CURRENT vs. AMBIENT
TEMPERATURE WITH FLASH
MAX8645Y toc11
T
A
(
°C)
TOTAL LED CURRENT (mA)
60
35
10
-15
50
100
150
200
250
300
350
400
450
0
-40
85
INDIVIDUAL MAIN LED CURRENT
vs. R
SETM
MAX8645Y toc12
R
SETM
(k
Ω)
MAIN LED CURRENT (mA)
10
10
100
1
100
1
Typical Operating Characteristics (continued)
(V
IN
= V
EN_
= 3.6V, circuit of Figure 2, T
A
= +25°C, unless otherwise noted.)