MAX8901B Maxim Integrated Products, MAX8901B Datasheet - Page 3

• Manufacturer Part Number: MAX8901B
• Description: Highest Efficiency Supply
• Manufacturer: Maxim Integrated Products

www.datasheet4u.com
ELECTRICAL CHARACTERISTICS (continued)
(V
Typical values are at T
Note 1: Specifications to -40°C are guaranteed by design and characterization and are not production tested.
Figure 1. MAX8901B Timing Diagram
Serial Dimming
Full-Scale LED Current Accuracy
PWM Frequency for PWM
Dimming Control
CS to COMP Transconductance
Soft-Start Interval
Thermal Shutdown
OSCILLATOR
Operating Frequency
Maximum Duty Cycle
n-CHANNEL SWITCH
LX Leakage Current
n-Channel Switch On-Resistance
n-Channel Current Limit
IN
I
STEP
Series WLEDs in a 2mm x 2mm TDFN Package
LED_
= V
> 40μs
t
HI_INIT
ON
SHUTDOWN
t
SOFT-START
PARAMETER
= V
OVP
0
= 3.6V, V
ON
_______________________________________________________________________________________
A
FULL
= +25°C.) (Note 1)
PGND
1
Highest Efficiency Supply for 2 to 6
= V
32/33
SYMBOL
GND
I
t
START
D
LXLKG
f
2
SOFT-
PWM
R
I
f
SW
MAX
LIM
31/33
LX
= 0V, COMP, CS, and LX are unconnected, T
3
30/33
I
(MAX8901B)
MAX8901A
C
V
V
LED
500ns TO 500μs
4
CS
LX
COMP
29/33
= 27V
= 0.4V
= 24.75mA
5
= 0.022µF (Figure 1)
28/33
t
LO
CONDITIONS
6/33
T
T
> 500ns
28
A
A
T
T
t
HI
5/33
A
A
= +25°C
= +85°C
= +25°C
= -40°C to +85°C
29
4/33
30
3/33
31
A
2/33
= -40°C to +85°C, unless otherwise noted.
32
1/33
MIN
0.63
700
40
90
-1
-3
33
FULL
32/33
TYP
0.70
100
160
750
0.1
0.1
0.7
60
10
92
1.33ms (typ)
t
SHDN
MAX
0.77
800
1.4
+1
+3
80
5
SHUTDOWN
UNITS
kHz
kHz
ms
µS
µA
°C
%
%
%
Ω
A
3