CAV4201TD-GT3 Datasheet, PDF (2/12 Pages) ON Semiconductor – 350 mA High Efficiency Step Down LED Driver

CAV4201
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameters
Ratings
Units
VBAT, SW, CTRL
−0.3 to +40
V
RSET
−0.3 to +5
V
Switch SW peak current
1
A
Storage Temperature Range
−65 to +160
_C
Junction Temperature Range
−40 to +150
_C
Lead Temperature
300
_C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
Table 2. RECOMMENDED OPERATING CONDITIONS
Parameters
Ratings
Units
VBAT voltage (Notes 1, 2)
6.5 to 36 (Note 1)
V
SW voltage
0 to 36
V
Ambient Temperature Range
−40 to +125
_C
LED Current
50 to 350
mA
Switching Frequency
50 to 1000
kHz
1. The VBAT pin voltage should be at least 3 V greater than the total sum of the LED forward voltages in order to operate at nominal LED current.
2. During power−up, the slew rate of the input supply should be greater than 1 ms for every 5 V increase of VBAT.
Table 3. ELECTRICAL CHARACTERISTICS
(V_IN = 13 V, ambient temperature of 25°C (over recommended operating conditions unless otherwise specified))
Symbol
Parameter
Conditions
Min
Typ
I_Q
Operating Supply Current on VBAT pin
I_SD
Idle Mode Supply Current on VBAT pin
CTRL = GND
V_FB
RSET Pin Voltage
2 LEDs with I_LED = 300 mA
I_LED
Programmed LED Current
R1 = 33 kW
R1 = 10 kW
R1 = 8.25 kW
0.4
90
1.15
1.2
100
270
300
350
V_{CTRL−FULL}
V_CTRL−EN
V_CTRL−SD
I_CTRL
CTRL Voltage for 100% Brightness
CTRL Voltage to Enable LEDs
CTRL Voltage to Shutdown LEDs
CTRL pin input bias
R_SW
T_SD
T_HYST
h
Switch “On” Resistance
Thermal Shutdown
Thermal Hysteresis
Efficiency
LED enable voltage threshold
LED disable voltage threshold
V_CTRL = 3 V
V_CTRL = 12 V
I_SW = 300 mA
Typical Application Circuit
2.6
0.9
0.4
0.9
40
200
0.9
150
20
86
Max Units
1
mA
mA
1.25
V
mA
330
3.1
V
1.2
V
V
80
mA
1.5
W
°C
°C
%
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