IS31LT3350-V2STLS2-TR ISSI, IS31LT3350-V2STLS2-TR Datasheet
IS31LT3350-V2STLS2-TR
Specifications of IS31LT3350-V2STLS2-TR
Available stocks
Related parts for IS31LT3350-V2STLS2-TR
IS31LT3350-V2STLS2-TR Summary of contents
Page 1
... Depending upon supply voltage and external components, this can provide watts of output power. The IS31LT3350 includes an integrated output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. ...
Page 2
... IS31LT3350 PIN CONFIGURATIONS Package Pin Configurations (Top View) SOT23-5 SOT89-5 PIN DESCRIPTION Pin Name NO. Description LX 1 Drain of power switch GND 2 Ground (0V) Multi-function On/Off and brightness control pin: * Leave floating for normal operation.(V I =0.1/R OUT nom * Drive to voltage below 0.2V to turn off output current ...
Page 3
... IS31LT3350 ORDERING INFORMATION Industrial Range: -40°C to +85°C Order Part No. IS31LT3350-V1STLS2-TR IS31LT3350-V2STLS2-TR IS31LT3350-V1SDLS2-TR IS31LT3350-V2SDLS2-TR Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 10/18/2011 Package QTY/Reel SOT23-5, Lead-free 3000 SOT23-5, Lead-free 3000 SOT89-5, Lead-free 2500 SOT89-5, Lead-free 2500 V SENSE 91mV~101mV 99mV~110mV 91mV~101mV 99mV~110mV ...
Page 4
... SOT23-5 1.2w @SOT89-5;600mw@SOT23-5 -40 to 85°C -55 to 150°C 150°C 108°C/W @SOT23-5; 45°C/W @SOT89-5 2kV Conditions ADJ pin grounded ADJ pin floating IS31LT3350-V1 IS31LT3350- 0.1V SENSE Measured on ADJ pin with pin floating V falling ADJ V rising ADJ REF ...
Page 5
... IS31LT3350 ELECTRICAL CHARACTERISTICS (CONTINUED) (V =12V, T =25°C unless otherwise stated) (NOTE Symbol Parameter I LX switch leakage current LX(leak Switch ‘On’ resistance LX Brightness control range at low D PWM(LF) frequency PWM signal Brightness control range at low D PWM(HF) frequency PWM signal f Operating frequency ...
Page 6
... IS31LT3350 TYPICAL PERFORMANCE CHARACTERISTICS For typical application circuit and T 100 Vin(V) Efficiency vs. No. of LEDs L=100uH, Rs=0.33Ohm 100 Vin(V) Efficiency vs. No. of LEDs L=47uH, Rs=0.33Ohm Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 10/18/2011 =25° ...
Page 7
... IS31LT3350 TYPICAL PERFORMANCE CHARACTERISTICS (CONTINUED) 1.201 1.2005 1.2 1.1995 1.199 1.1985 Vin(V) Vref vs. Vin over nominal supply voltage range 600 500 400 300 200 100 Supply Current vs. Vin (Operating) Integrated Silicon Solution, Inc. – www.issi.com Rev ...
Page 8
... ESR of this capacitor appears in series with the supply source impedance and lowers overall efficiency. This capacitor has to supply the relatively high peak current to the coil and smooth the current ripple on the input supply. , the signal range is from S 10K IS31LT3350 ADJ GND GND 8 ...
Page 9
... Capacitors with Y5V dielectric are not suitable for decoupling in this application and should not be used. Inductor selection Recommended inductor values for the IS31LT3350 are in the range of 47μH to 220μH. Higher values of inductance are recommended at higher supply voltages and low output current in order to minimize errors due to switching delays, which result in increased ripple and lower efficiency ...
Page 10
... VIN C1 LED SENSE LX IS31LT3350 ADJ A value of 1μF will reduce nominal ripple current by a factor three (approx.). Proportionally lower ripple can be achieved with higher capacitor values. Note that the capacitor will not affect operating frequency or efficiency, but it will increase start-up delay, by reducing the rate of rise of LED voltage ...
Page 11
... IS31LT3350 PACKAGE INFORMATION SOT23-5 Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 10/18/2011 11 ...
Page 12
... IS31LT3350 SOT89-5 Integrated Silicon Solution, Inc. – www.issi.com Rev. A, 10/18/2011 12 ...