Diodes PAM2808 User Manual
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Description
The PAM2808 is a 5W high power HBLED driver with 1.5A constant
current. It features high efficiency and low quiescent current, making it
ideal for battery powered applications.
The PAM2808 features over current protection and over temperature
shutdown. The PAM2808 is stable with a ceramic output capacitor of
4.7µF or higher.
PAM2808 is available in SOP-8(EP) package.
Features
Pin Assignments
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Diodes Incorporated
PAM2808
5W HIGH POWER HBLED DRIVER
• High Output Current Up to 1.5A
• Low Feedback Voltage: 0.1V
• Stable with a Ceramic Output Capacitor
• Low Quiescent Current
• Open Load LED Protection
• Over Temperature Shutdown
• Low Temperature Coefficient
• Standard SOP-8(EP) Packages
• Pb-Free Package
Typical Applications Circuit
Applications
• High Bright LED Driver
• White LED Torch (Flashlight)
PAM2808
Document number: DSxxxxx Rev. 1 - 0
www.diodes.com
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October 2012
© Diodes Incorporated
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Pin Description
Pin
Number
1
2
3
4
5 NC Not Connected
6 FB Feedback
7 VOUT Output Voltage
8 NC Not Connected
Pin
Name
NC
VIN Input Voltage
EN Enabled
GND Ground
Not Connected
Block Diagram
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PAM2808
Function
Absolute Maximum Ratings (@T
These are stress ratings only and functional operation is not implied. Exposure to absolute maximum ratings for prolonged time periods may
affect device reliability. All voltages are with respect to ground.
Parameter Rating Unit
Input Pin Voltage 6.5
EN, FB VOUT Pin Voltage
Maximum Output Current
Storage Temperature -65 to +150
Maximum Junction Temperature 150
Lead Soldering Temperature 300
PAM2808
Document number: DSxxxxx Rev. 1 - 0
= +25°C, unless otherwise specified.)
A
-0.3 to V
P
/(VIN – VO)
D
+0.3
IN
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V
—
°C
October 2012
© Diodes Incorporated
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Diodes Incorporated
PAM2808
Recommended Operating Conditions (@T
Parameter Rating Unit
Maximum Supply Voltage 6 V
Junction Temperature Range -40 to +125
Ambient Temperature Range -40 to +85
= +25°C, unless otherwise specified.)
A
°C
Thermal Information
Parameter Symbol Package Max Unit
Thermal Resistance (Junction to Case)
Thermal Resistance (Junction to Ambient)
Electrical Characteristics (@T
Parameter Symbol Test Conditions Min Typ Max Units
Input Voltage Range
FB Reference Voltage
Output Current
Over Temperature Shutdown OTS 150 °C
Over Temperature Hysteresis OTH 40 °C
EN Input High Threshold
EN Input Low Threshold
Shutdown Current
V
IN
V
REF
I
O
V
EH
V
VIN = 2.5V to 5V
EL
I
VEN = 0V
SD
θ
JC
θ
JA
= +25°C, VIN = 4.5V, CIN = 4.7µF, CO = 4.7µF, unless otherwise specified.)
A
0.1 V
= 0.3Ω
R
S
RS = 0.14Ω
RS = 0.1Ω
RS = 0.067Ω
VIN = 2.5V to 5V
PAM2808
Document number: DSxxxxx Rev. 1 - 0
SOP-8(EP) 11
SOP-8(EP) 90
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°C/W
2.5 6.0 V
330
700
1000
1500
1.5 V
0.3 V
1 µA
© Diodes Incorporated
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October 2012
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