Rainbow-electronics MAX17061 Bedienungsanleitung PDF herunterladen (Seite 4)

MAX17061

8-String White LED Driver with

SMBus for LCD Panel Applications

4 _______________________________________________________________________________________

ELECTRICAL CHARACTERISTICS (continued)

(Circuit of Figure 1, V

= 12V, C

CCV

= 0.022µF, R

CCV

= 5.1kΩ, V

ISET

= V

OSC

= V

, R

FSET

= 464kΩ, V

PWMI

= GND,

= 0°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.)

PARAMETER CONDITIONS MIN TYP MAX UNITS

PWM FILTER

PWM Output Impedance 20 40 60 kΩ

FSET

= 464kΩ 197 200 203

FSET

= 113kΩ 750 785 820

FSET

= 65kΩ 1.270 1.335 1.400

DPWM Oscillator Frequency

FSET

= 42kΩ 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

= 12V, C

CCV

= 0.022µF, R

CCV

= 5.1kΩ, V

ISET

= V

OSC

= V

, R

FSET

= 464kΩ, V

PWMI

= GND,

= -40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.) (Note 2)

PARAMETER CONDITIONS MIN TYP MAX UNITS

= V

4.5 5.5

IN Input Voltage Range

VCC = open 5.5 26.0

= 26V 2

MAX17061 is enabled at

minimum brightness, no load

= V

= 5V 2

IN Quiescent Current

MAX17061 is disabled, V

= 12V 10 µA

MAX17061 is enabled, 6V < V

< 26V, 0 < I

VCC

< 10mA 4.7 5.3

Output Voltage

MAX17061 is disabled, V

= 12V 3.9 4.8

Current Limit V

is forced to 4.5V 12 70 mA

UVLO Threshold Rising edge, typical hysteresis = 85mV 4.00 4.45 V

1 2 3 4 5 6 7 8 9 ... 25 26

MAX17061 1

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