Rainbow-electronics MAX17061 Bedienungsanleitung PDF herunterladen (Seite 3)

MAX17061

8-String White LED Driver with

SMBus for LCD Panel Applications

_______________________________________________________________________________________ 3

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

INPUT LEAKAGE

PWMI Leakage Current -0.3 +0.3 µA

ISET, FSET Leakage Current ISET , FSET to V

+1 µA

OV Leakage Current -0.1 +0.1 µA

SDA, SCL Input Bias Current -1 +1 µA

SDA Output Low-Sink Current V

SDA

= 0.4V 4 mA

OSC Leakage Current -3 +3 µA

LED CURRENT

ISET = V

24.5 25.0 25.5

ISET

133kΩ 28.8 30.0 31.2

ISET

= 200kΩ 19.3 20.0 20.7

Full-Scale FB_ Output Current

ISET

266kΩ 14.4 15.0 15.6

ISET High-Level Threshold

0.4

ISET Output Voltage 1.166 1.236 1.306 V

C ur r ent Reg ul ati on Betw een S tr i ng s Full brightness -1.5 +1.5 %

FB_

= 25mA 475 625 910

FB_

= 30mA 575 750 1100

FB_

= 20mA 380 500 740

Minimum FB_ Regulation Voltage

FB_

= 15mA 285 375 560

Maximum FB_ Ripple I

FB_

= 20mA (C

OUT

= 1µF, V

OSC

= V

) (Note1) 120 200 mV

P/P

FB_ On-Resistance V

FB_

= 50mV (includes 10Ω sense resistor) 17.5 28.4 Ω

FB_

= 26V, T

= +25°C 1

FB_ Leakage Current

FB_

= 45V, T

= +25°C 2.5 4

µA

FAULT PROTECTION

OV Threshold Voltage Rising edge, typical hysteresis = 60mV 1.166 1.236 1.306 V

FB_ Overvoltage Threshold V

> 5.5V 5.2 5.6 6.0 V

FB_ Undervoltage Threshold 130 175 220 mV

OV Undervoltage Threshold

(Boost Global Fail)

48 84 120 mV

Thermal-Shutdown Threshold (Note 1) 160 °C

Over cur r ent FAU LT S hutd ow n Ti m er I

PEAK

> 3.3A at duty = 0% 88 128 168 µs

FB_ Overvoltage Fault Timer Full brightness 1.7 2 2.3 ms

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

MAX17061 1

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