LT3465A Ver la hoja de datos (PDF) - Linear Technology
Número de pieza
componentes Descripción
Fabricante
LT3465A Datasheet PDF : 12 Pages
| |||
LT3465A
TYPICAL PERFOR A CE CHARACTERISTICS
Quiescent Current (CTRL = 3V)
3.0
2.5
2.0
1.5
1.0
0.5
0
0
–50°C
25°C
100°C
5
10
15
20
VIN (V)
3465 G10
VIN = 3.6V, 4 LEDs
80
20mA
79
78
15mA
77
76
10mA
75
74
73
72
71
70
–50
0
50
100
TEMPERATURE (°C)
3465A G12
Switching Current Limit
400
350
300
250
200
150
100
50
0
0
–50°C
25°C
100°C
20
40
60
80 100
DUTY CYCLE (%)
3465 G11
Schottky Leakage Current
8
7
VR = 25
6
VR = 16
5
VR = 10
4
3
2
1
0
–50
0
50
TEMPERATURE (°C)
100
3465 G13
PI FU CTIO S
VOUT (Pin 1): Output Pin. Connect to output capacitor and
LEDs. Minimize trace between this pin and output capaci-
tor to reduce EMI.
GND (Pin 2): Ground Pin. Connect directly to local ground
plane.
FB (Pin 3): Feedback Pin. Reference voltage is 200mV.
Connect LEDs and a resistor at this pin. LED current is
determined by the resistance and CTRL pin voltage:
ILED
≈
200mV
RFB
When
VCTRL
> 1.8V
ILED
≈
VCTRL
5 •RFB
When VCTRL
< 1V
(1)
4
CTRL (Pin 4): Dimming Control and Shutdown Pin. Ground
this pin to shut down the device. When VCTRL is greater
than about 1.8V, full-scale LED current is generated. When
VCTRL is less than 1V, LED current is reduced.
VIN (Pin 5): Input Supply Pin. Must be locally bypassed
with a 1µF X5R or X7R type ceramic capacitor.
SW (Pin 6): Switch Pin. Connect inductor here.
3465ai
Share Link: 