Rainbow Electronics MAX17061 - Manual (Page 4)

MAX17061
8-String White LED Driver with
SMBus for LCD Panel Applications
4 _______________________________________________________________________________________
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 = 0°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.)
PARAMETER CONDITIONS MIN TYP MAX UNITS
PWM FILTER
PWM Output Impedance 20 40 60 k Ω
R FSET = 464k Ω 197 200 203
R FSET = 113k Ω 750 785 820
Hz
R
FSET
= 65k Ω 1.270 1.335 1.400
DPWM Oscillator Frequency
R FSET = 42k Ω 2
kHz
PWMI Input-Frequency Range 5 10 100 kHz
PWMI Full-Range Accuracy 5 LSB
PWMI duty cycle = 100% 98 100
PWMI duty cycle = 50% 48 50 52 PWMI Brightness Setting
PWMI duty cycle = 0% 2.6 2.7 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
ELECTRICAL CHARACTERISTICS
(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
V IN = V CC 4.5 5.5
IN Input Voltage Range
VCC = open 5.5 26.0
V
V IN = 26V 2 MAX17061 is enabled at
minimum brightness, no load
V IN = V CC = 5V 2
mA
IN Quiescent Current
MAX17061 is disabled, V IN = 12V 10 µA
MAX17061 is enabled, 6V < V IN < 26V, 0 < I VCC < 10mA 4.7 5.3
V CC Output Voltage
MAX17061 is disabled, V IN = 12V 3.9 4.8
V
V CC Current Limit V CC is forced to 4.5V 12 70 mA
V
CC
UVLO Threshold Rising edge, typical hysteresis = 85mV 4.00 4.45 V