MAX8901A 查看數據表（PDF） - Maxim Integrated
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MAX8901A
Maxim Integrated
MAX8901A Datasheet PDF : 14 Pages
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MAX8901A/MAX8901B
Highest Efficiency Supply
for 2 to 6 Series WLEDs in a
2mm x 2mm TDFN Package
Typical Operating Characteristics (continued)
(Circuit of Figure 5, ILED = 24.75mA, VIN = VON = 3.6V, C1 = 1µF, C2 = 1µF, TA = +25°C, unless otherwise noted.)
PWM DIMMING RESPONSE
(MAX8901A)
MAX8901A/B toc13
VON
D = 90%
VIN
D = 10%
2V/div
0V
VON
50mV/div
VIN
(AC-COUPLED)
VCS
500mV/div
VCS
0V
VOUT
20mV/div
VOUT
fON_PWM = 100kHz, DUTY 0V
CYCLE CHANGE: 90% TO
10%, C2 = 0.1μF
20mA/div
ILEDs
ILEDs
0mA
4ms/div
SERIAL PULSE DIMMING
RESPONSE (MAX8901B)
MAX8901A/B toc14
2V/div
0V
50mV/div
(AC-COUPLED)
1V/div
0V
20mV/div
0V
10ms/div
20mA/div
0mA
LED CURRENT vs. PWM
DIMMING (MAX8901A)
30
25
20
15
10
5
RCS = 20Ω,
fPWM = 100kHz
0
0
20
40
60
80
100
PWM DUTY CYCLE (%)
507.5
507.0
506.5
506.0
505.5
505.0
504.5
504.0
503.5
503.0
502.5
0
VCS vs. LED CURRENT STEP
(MAX8901B)
5 10 15 20 25 30 35
LED CURRENT STEP
MAXIMUM LED CURRENT
vs. TEMPERATURE (MAX8901B)
25.0
MINIMUM LED CURRENT
vs. TEMPERATURE (MAX8901B)
750
24.8
745
24.6
740
24.4
735
24.2
24.0
-40 -15 10
35
60
85
TEMPERATURE (°C)
730
-40 -15
10
35
60
85
TEMPERATURE (°C)
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