MAX8630W Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Lista de partido
MAX8630W Datasheet PDF : 12 Pages
| |||
125mA 1x/1.5x Charge Pumps for 5 White LEDs
in 3mm x 3mm TDFN
ELECTRICAL CHARACTERISTICS (continued)
(VIN = 3.6V, VGND = 0V, EN_ (PWM) = IN, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Open-Loop OUT Resistance
Maximum OUT Current
OUT Short-Circuit Current Limit
Switching Frequency
1x mode, (VIN - VOUT) / IOUT
1.5x mode, (1.5VIN - VOUT) / IOUT
VIN ≥ 3.2V, VOUT = 3.9V
VOUT < 1.25V
0.8
1.5
Ω
3.2
7.2
125
mA
57
mA
1
MHz
Direct-PWM Dimming Filter
CCPWM = 0.1µF, (PWM frequency of 900Hz to 200kHz
Corner Frequency (MAX8630W) recommended)
10
Hz
EN_ (PWM) High Voltage
EN_ (PWM) Low Voltage
EN_ (PWM) Minimum Input
Slew Rate
VIN = 2.7V to 5.5V
VIN = 2.7V to 5.5V
1.4
V
0.4
V
VIN = 2.7V to 5.5V (recommended minimum slew rate)
1
V/µs
EN_ (PWM) Input Current
VEN_ (PWM) = 0V or 5.5V
TA = +25°C
TA = +85°C
0.01
1
µA
0.1
EN_ (PWM) Low Shutdown Delay
(tSHDN)
4
ms
EN_ tLO (See Figure 4)
EN_ tHI (See Figure 4)
Initial EN_ tHI (See Figure 4)
Thermal Shutdown
Thermal-Shutdown Hysteresis
First EN_ (PWM) high pulse
0.5
500.0
µs
0.5
µs
50
µs
+160
°C
20
°C
Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: Dropout voltage is defined as the LED_ to GND voltage at which current into LED_ drops 10% from the value at VLED_ = 0.2V.
Typical Operating Characteristics
(VIN = 3.6V, ENM = ENS = IN, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. INPUT VOLTAGE
DRIVING 5 LEDs
100
90
80
70
60
50 ILED = 1.875mA
ILED = 20mA
40
30
ILED = 8.125mA
20
10
0
2.7
VIN FALLING
3.0 3.3 3.6 3.9 4.2
INPUT VOLTAGE (V)
INPUT CURRENT vs. INPUT VOLTAGE
DRIVING 5 LEDs
160
VIN FALLING
140
120 ILED = 20mA
100
ILED = 8.125mA
80
60
40 ILED = 1.875mA
20
0
2.7 3.0 3.3 3.6 3.9 4.2
INPUT VOLTAGE (V)
INPUT CURRENT vs. INPUT VOLTAGE
DRIVING 3 MAIN LEDs
160
VIN FALLING
140
120 ILED = 20mA
100
80
ILED = 8.125mA
60
40
ILED = 1.875mA
20
0
2.7 3.0 3.3 3.6 3.9 4.2
INPUT VOLTAGE (V)
_______________________________________________________________________________________ 3
Share Link: 