Pam2845, Electrical characteristics – Diodes PAM2845 User 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