MAX1984ETP Ver la hoja de datos (PDF) - Maxim Integrated
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MAX1984ETP Datasheet PDF : 17 Pages
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Ultra-High-Efficiency White
LED Drivers
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1; VIN = 3.3V, SETI = BITA = BITB = BITC = SEL = IN, MODE = GND, COUT = 4.7µF, CREF = 0.22µF, TA = -40°C to
+85°C, unless otherwise noted.) (Note 3)
PARAMETER
IN Supply Range
CONDITIONS
MIN TYP MAX UNITS
2.7
5.5
V
IN Undervoltage Lockout Threshold 50mV typical hysteresis
2.2
2.6
V
IN Quiescent Current
REF Output Voltage
REF Line Regulation
REF Load Regulation
Oscillator Frequency
BITA = BITB = BITC = IN, LD1 to LD8 = GND
IREF = 0
2.7V < VIN < 5.5V
-1µA < IREF < +50µA
OUT Overvoltage Protection
Threshold
INTERNAL MOSFET SWITCHES
N-Channel MOSFET On-Resistance
P-Channel MOSFET On-Resistance
N-Channel MOSFET Current Limit
CONTROL INPUTS
VLD1 to VLD8 = 50mV, OUT rising, 100mV typical
hysteresis
ILX = 200mA
ILX = 200mA
MAX1984
MAX1985
MAX1986
BITA, BITB, BITC Input Logic Low
Level
2.7V < VIN < 5.5V
BITA, BITB, BITC Input Logic High
Level
2.7V < VIN < 5.5V
MODE Input Logic Low Level
2.7V < VIN < 5.5V
MODE Input Logic High Level
2.7V < VIN < 5.5V
SEL Input Logic Low Level
2.7V < VIN < 5.5V
SEL Input Logic Midlevel
2.7V < VIN < 5.5V
SEL Input Logic High Level
2.7V < VIN < 5.5V
FULL-SCALE LED CURRENT ADJUSTMENT
VLD_ = 80mV, SETI = BITA = BITB = BITC = IN
VLD_ = 80mV, RSETI = 278kΩ ±1%, BITA = BITB =
BITC = IN
LD1 to LD8 Output Current
VLD_ = 80mV, RSETI = 1.8MΩ ±1%, BITA = BITB =
BITC = IN
VLD_ = 80mV, RSETI = 697kΩ ±1%, BITA = BITB =
BITC = IN
SETI = GND
1.230
0.8
5.1
0.50
0.40
0.30
1.6
VIN - 0.4
0.50
2.05
16
22
11.5
15.5
0.42
600
1.270
5
15
1.2
5.5
µA
V
mV
mV
MHz
V
0.8
Ω
1.0
Ω
0.81
0.65
A
0.52
0.4
V
V
0.4
V
V
0.4
V
1.85
V
V
20
28
16.0
mA
20.0
0.60
4 _______________________________________________________________________________________
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