MAX1985 데이터 시트보기 (PDF) - Maxim Integrated
부품명
상세내역
제조사
MAX1985 Datasheet PDF : 17 Pages
| |||
Ultra-High-Efficiency White
LED Drivers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1; VIN = 3.3V, SETI = BITA = BITB = BITC = SEL = IN, MODE = GND, COUT = 4.7µF, CREF = 0.22µF, TA = 0°C to +85°C,
unless otherwise noted. Typical values are at TA = +25°C.)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SEL Input Logic Low Level
SEL Input Logic Midlevel
2.7V < VIN < 5.5V
2.7V < VIN < 5.5V
0.4
V
0.50
1.85
V
SEL Input Logic High Level
SEL Input Bias Current
2.7V < VIN < 5.5V
SEL = GND, current out of the pin
SEL = IN, current into the pin
2.05
V
5
µA
10
FULL-SCALE LED CURRENT ADJUSTMENT
VLD_ = 80mV, SETI = BITA = BITB = BITC = IN
16.5
18
19.5
VLD_ = 80mV, RSETI = 278kΩ ±0.1%, BITA = BITB =
22.5
25
27.5
BITC = IN
LD1 to LD8 Output Current
VLD_ = 80mV, RSETI = 1.8MΩ ±0.1%, BITA = BITB = 12.5
14
15.5
BITC = IN
mA
VLD_ = 80mV, RSETI = 597kΩ ±0.1%, BITA = BITB =
16.5
18
19.5
BITC = IN
VLD1 = 1V, RSETI = 10kΩ, BITA = BITB = BITC = IN
SETI = GND
26
0.42 0.50 0.60
LD1 to LD8 Regulation Voltage
SETI = IN, ILX = 120mA (MAX1984),
110mA (MAX1985), 98mA (MAX1986)
80
100 120
mV
SETI High-Level Threshold
(18mA LED Default Current)
2.7V < VIN < 5.5V
VIN - 0.4
V
SETI Low-Level Threshold
(0.5mA LED Default Current)
2.7V < VIN < 5.5V
50
125
mV
SETI Output Current
OUTPUT CURRENT SOURCE
LD1 to LD8 On-Resistance
LD1 to LD8 Current-Source
Compliance
SETI = GND
VLD_ = 50mV, VOUT = 3.5V
BITA = BITB = BITC = IN, 80mV < VLD_ < 1V
(Note 1)
40
70
100
µA
3
4
Ω
0.3
5
%
LD1 to LD8 Leakage Current
BITA = BITB = BITC = GND
DIGITAL BRIGHTNESS CONTROL
0.01
1
µA
2-Bit Control DAC LSB
MODE = SETI = BITB = IN, BITA = BITC = GND
(Note 2)
26
33
39
%
3-Bit Control DAC LSB
SETI = BITC = IN, MODE = BITA = BITB = GND
(Note 2)
7
14
21
%
DPWM BRIGHTNESS CONTROL
DPWM Input Supply Range
DPWM Shutdown Duty Cycle
MODE = BITC = IN
BITC = GND
2.3
5.5
V
3
5
7
%
_______________________________________________________________________________________ 3
Share Link: 