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AP8802H
60V 1A LED STEP-DOWN CONVERTER
Absolute Maximum Ratings (Note 4)
Symbol
V IN
V SW
V CTRL
V SENSE
T J
T LEAD
T ST
V IN pin Voltage
SW Voltage
CTRL Pin Input Voltage
SET Voltage (Note 5)
Junction Temperature
Lead Temperature Soldering
Storage Temperature Range
Parameter
Rating
-0.3 to +65
-0.3 to +65
-0.3 to +6
+0.3 to -5
150
300
-65 to +150
Unit
V
V
V
V
°C
°C
°C
Note:
Caution:
4 All voltages unless otherwise stated are measured with respect to GND.
5. V SENSE is measured with respect to V IN .
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings
only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not
implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when
handling and transporting these devices.
Recommended Operating Conditions
Symbol
V IN
V CTRLDC
V CTRLL
f OSC
T A
Duty Cycle
Parameter
Operating Input Voltage relative to GND
Voltage range for 24% to 200% DC dimming relative to GND (Note 6)
Voltage Low for PWM dimming relative to GND
Maximum Switching Frequency (Note 7)
Ambient Temperature Range
Using Inductor ≥ 100μH (Note 8)
Min
8.0
0.3
0
—
-40
0.10
Max
60.0
2.5
0.2
625
+125
0.95
Unit
V
V
V
kHz
°C
—
Notes:
6. For 100% brightness either leave floating or connect to 1.25V relative to GND.
7. AP8802H will operate at higher frequencies but accuracy will be affected due to propagation delays.
8. For most applications the LED current will be within 5% over the duty cycle range specified. Duty cycle accuracy is also dependent on
propagation delay. Smaller size inductors can be used but LED current accuracy may be greater than 8% at extremes of duty cycle. This is most
noticeable at low duty cycles (less than 0.1) or when the input voltage is high and only one LED is being driven.
Electrical Characteristics (V IN = 12V, T A = +25°C, unless otherwise specified.)
Symbol
I OUT
I Q
V THD
V SENSEHYS
SET
V REF
R DS(ON)
I SW_LEAKAGE
θ JA
θ JC
Parameter
Continuous switch current
Quiescent Current
Internal Threshold Voltage
Sense threshold hysteresis
SET pin input current
Internal Reference Voltage
On Resistance of MOSFET
Switch leakage current
Thermal Resistance Junction-to-Ambient
Thermal Resistance Junction-to-Case
Conditions
(Note 9)
V SET = V IN -0.2
I SW = 0.8A
SO-8EP (Note 10)
SO-8EP (Note 10)
Min
—
-
190
—
—
—
—
—
—
—
Typ
—
75
200
15
5
1.25
0.65
-
45
7
Max
1
120
210
—
—
—
1.10
8
—
—
Unit
A
μ A
mV
%
μ A
V
?
μ A
° C/W
° C/W
Notes:
9. Refer to figure 8 for the device derating curve.
10. Test condition for SO-8EP: Device mounted on FR-4 PCB, 2”x2”, 2oz copper, minimum recommended pad layout on top layer and thermal vias to
bottom layer ground plane. See Land pad diagram For better thermal performance, larger copper pad for heat-sink is needed.
AP8802H
Document number: DS32227 Rev. 6 - 2
3 of 14
www.diodes.com
May 2012
? Diodes Incorporated
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