Diodes PAM2845 - Manual (Page 5)

PAM2845
Document number: DSxxxxx Rev. 1 - 2
5 of 14
www.diodes.com
October 2012
© Diodes Incorporated
PAM2845
A Product Line of
Diodes Incorporated
Electrical Characteristics
(cont.) (@T
A
= +25°C, V
IN
= ENA = 12V, L = 22µH, R
SET
= 10kΩ, unless otherwise specified.)
Parameter Test Conditions Min Typ Max Units
LED Controller Stage
Full-Scale LED_Output Current
I = 190*1.2V/R
ISET
, R
ISET
= 7.68k 30 mA
I = 190*1.2V/R
ISET
, R
ISET
= 11.3k 20 mA
I = 190*1.2V/R
ISET
, R
ISET
= 22.6k 10 mA
LED Current Matching -3 1 +3 %
ISET Voltage 1.2 V
Minimums LED Voltage 400 mV
Analog Dimming Range I = 190*1.2V/R
ISET
I/32 I mA
PWM Dimming Frequency 100 1k Hz
Fault Protection
LED_Overvoltage Threshold 4.6 4.9 5.1 V
LED_Overvoltage Hysteresis 1 V
Thermal-Shutdown 150 °C
Thermal-Shutdown Hysteresis 30 °C
Control Interface
EN High 1.5 V
EN Low 0.4 V
PWMD High 1.5 V
PWMD Low 0.4 V
FSEL High
V
CC
_5V -
0.5
V
FSEL Midlevel 1 2 V
FSEL Low 0.5 V
EN Min Pulse Width 0.5 µs
EN Max Pulse Width 10 µs
EN Off Delay 10 µs