Rainbow Electronics MAX17061 User Manual
Page 6
MAX17061
8-String White LED Driver with
SMBus for LCD Panel Applications
6
_______________________________________________________________________________________
Note 1: Specifications are guaranteed by design, not production tested.
Note 2: Specifications to -40°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
IN
= 12V, C
CCV
= 0.022µF, R
CCV
= 5.1k
Ω, V
ISET
= V
OSC
= V
DD
= V
CC
, R
FSET
= 464k
Ω, V
PWMI
= GND,
T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
FAULT PROTECTION
OV Threshold Voltage
Rising edge, typical hysteresis = 60mV
1.166
1.306
V
FB_ Overvoltage Threshold
5.2
6.0
V
FB_ Undervoltage Threshold
130
220
mV
OV Undervoltage Threshold
(Boost Global Fail)
48
120
mV
Over cur r ent FAU LT S hutd ow n Ti m er
I
PEAK
> 3.3A at duty = 0%
88
168
µs
FB_ Overvoltage Fault Timer
1.6
2.4
ms
PWM FILTER
PWM Output Impedance
20
60
k
Ω
R
FSET
= 464k
Ω
197
203
kHz
R
FSET
= 113k
Ω
750
820
Hz
DPWM Oscillator Frequency
R
FSET
= 65k
Ω
1.27
1.40
kHz
PWMI Input Frequency Range
5
100
kHz
PWMI Full-Range Accuracy
5
LSB
PWMI duty cycle = 100%
98
PWMI duty cycle = 50%
48
52
PWMI Brightness Setting
PWMI duty cycle = 0%
2.6
2.8
%
SMBus TIMING SPECIFICATION
SMBus Frequency
FSMB
10
100
kHz
Bus Free Time
TBUF
4.7
µs
START Condition Hold
Time from SCL
THD:STA
4
µs
START Condition Setup
Time from SCL
TSU:STA
4.7
µs
STOP Condition Setup
Time from SCL
TSU:STO
4
µs
SDA Hold Time from SCL
THD:DAT
300
ns
SDA Setup Time from SCL
TSU:DAT
250
ns
SCL Low Period
T
LOW
4.7
µs
SCL High Period
T
HIGH
4
µs