AP8800 Datasheet, PDF (4/11 Pages) Diodes Incorporated – 350mA LED Step-Down Converter

AP8800
350mA LED Step-Down Converter
Electrical Characteristics (V_IN =12V, T_A=25^oC, unless otherwise specified)
Symbol
Parameter
Conditions
Min Typ. Max Unit
V_IN
I_OUT
I_Q
F_OSC
V_THD
V_REF
SET
Rds(on)
Operating Input Voltage
Continuous switch Current
Quiescient Current
Switching Frequency
Internal Threshold Voltage
Internal Reference Voltage
SET pin input current
On Resistance of MOSFET
(Note 3)
V_SET=V_IN-0.1
8.0
-
28 V
-
-
350 mA
-
20
30 μA
-
0.25
- MHz
92 100 108 mV
-
1.25
-
V
-
1.3
-
μA
1.7 2.2 Ω
I_{SW Leakage} Switch leakage current
EN Voltage High
ON
-
-
1.25
-
5 μA
-
V
EN Voltage Low
OFF
-
-
0.2 V
θ_JA
Thermal Resistance
Junction-to-Ambient
SOP-8L (Note 4)
MSOP-8L (Note 4)
DFN3030-10 (Note 4)
-
92
- °C/W
-
120
- °C/W
-
46
- °C/W
θ_JC
Thermal Resistance
Junction-to-Case
SOP-8L (Note 4)
MSOP-8L (Note 4)
DFN3030-10 (Note 4)
-
60
- °C/W
-
98
- °C/W
-
32
- °C/W
Notes:
3. Refer to figure 4 for the device derating curve.
4. Test condition for SOP-8L, MSOP-8L and DFN3030-10: 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. For better thermal performance, larger copper pad for heat-sink is
needed.
Typical Application Circuit
AP8800 Rev. 1
4 of 11
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MARCH 2009
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