Diodes PAM2842 - Manual (Page 5)

PAM2842
Document number: DSxxxxx Rev. 1 - 2
5 of 17
www.diodes.com
October 2012
© Diodes Incorporated
PAM2842
A Product Line of
Diodes Incorporated
Electrical Characteristics
(cont.) (@T
A
= +25°C, V
EN
= V
DD
= 24V, 1W x 10 LEDs, unless otherwise specified.)
Parameter Test Conditions Min Typ Max Units
LDO Stage
VDD_5V No Switching 4.5 5 5.5 V
VDD_5V Current Limit No Switching 14 74 90 mA
VDD_5V UVLO Threshold No Switching 3.7 4.0 4.3 V
VDD_5V UVLO Hysteresis No Switching 200 mV
VDD_DR No Switching 4.5 5 5.5 V
VDD_DR Current_Limit No Switching 14 50 90 mA
VDD_DR UVLO Threshold No Switching 3.7 4.0 4.3 V
Switch Stage
Switch RDS(ON) VDD_5V = 5V 0.1 Ω
Switch Current Limit 3.5 A
Switch Leakage Current 50 µA
RT Voltage R
RT
= 71kΩ 1.1 1.2 1.3 V
Switching Frequency (Note 2)
R
RT
= 30kΩ 800k 1M 1.2M Hz
R
RT
= 71kΩ 400 500 600 kHz
R
RT
= 180kΩ 160 200 240 kHz
Min Duty Cycle
F
SW
= 1MHz 10 %
F
SW
= 500kHz 5 %
F
SW
= 200kHz 2.5 %
Max Duty Cycle
Low Side Sense 95 %
High Side Sense 100 %
VC Source Current Feedback Voltage = 0 30 µA
VC Sink Current Feedback Voltage = 0 30 µA
Fault Protection
OV Threshold Voltage 1.1 1.2 1.3 V
OV Hysteresis 70 mV
Thermal Shutdown 150 °C
Thermal Shutdown Hysteresis 30 °C
Control Interface
EN High 1.5 V
EN Low 0.4 V
Note: 2. Switching frequency
) k 12 R ( x 24
10
F
RT
12
SW
+
=
, reference value.