IC-Hersteller ISSI

IC-Hersteller (104)

ISSI IS32LT3958A | Demoboard IS32LT3958A SEPIC EVALUATION BOARD

HIGH VOLTAGE LED LIGHTING CONTROLLER WITH INTERNAL PWM GENERATOR AND FAULT PROTECTION

Details

TopologieSEPIC Buck-Boost Topologie
Eingangsspannung5-70 V
Schaltfrequenz100-1000 kHz
IC-RevisionA

Beschreibung

The IS32LT3958A is a current mode PWM controller designed to drive a low side external NMOS FET for wide input/output voltage range and high LED current applications. An external resistor senses the high side output current of the LED string. A high side sense resistor is the most flexible current sensing scheme, since it functions in either boost or buck-boost mode configurations. The controller can be configured with an external resistor to operate between 100kHz~1MHz frequency resulting in small external inductor and capacitors while maintaining high efficiency. A single capacitor is all that is required to set the spread spectrum dither frequency to reduce the radiated peak emission and optimize the system EMI performance.

Eigenschaften

  • Wide high voltage input range: 5V to 70V
  • Supports boost, buck-boost, SEPIC and buck topology
  • Supports either analog, internal PWM dimming or external PWM dimming
  • Excellent fade on control by low duty cycle PWM dimming
  • Standalone dual brightness output by internal PWM dimming
  • Integrated PWM generator
  • 100Hz~1kHz adjustable PWM frequency - 5%~100% adjustable PWM duty cycle
  • Excellent analog dimming capability
  • Two analog dimming pins
  • LED binning capability
  • LED over temperature current roll-off
  • Externally programmable input undervoltagelockout
  • ±2.8% output current accuracy over -40°C ~ +150°C temperature
  • Adjustable operating frequency range of 100kHz~1MHz
  • Programmable soft-start to avoid inrush current
  • EMI reduction capabilities
  • Programmable spread spectrum function
  • Operating frequency synchronization with external clock source
  • Fault protection with reporting:
  • VCC undervoltage lockout (not reported)
  • Programmable output overvoltage protection
  • Output short circuit protection
  • RT/SYNC pin short protection
  • VDD pin short protection
  • VDD undervoltage lockout (not reported)
  • Over temperature protection
  • AEC-Q100 Qualified with Temperature Grade 1: -40°C to 125°C
  • RoHS & Halogen-Free Compliance
  • TSCA Compliance

Typische Anwendungen

  • Automotive, Headlight, Daytime running light, Fog light,Tail light

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieL1
(µH)
L2
(µH)
IR 1
(A)
IR 2
(A)
ISAT 1
(A)
RDC1 typ
(Ω)
RDC2 typ
(Ω)
RDC1 max
(Ω)
RDC2 max
(Ω)
fres
(MHz)
Typ Muster
744870100SPEC

Anstehende PCN

Aufgrund einer anstehenden PCN wird in Kürze eine Änderung am Bauteil durchgeführt. Anbei finden Sie die entsprechende PCN. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter.

9 Dateien Aktiv i| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre.WE-DD SMT-Doppeldrossel 10 10 2.7 2.7 7 0.038 0.038 0.044 0.044 18 Gekreuzt
Artikel Nr. Daten­blatt Simu­lation
744870100SPEC

Anstehende PCN

Aufgrund einer anstehenden PCN wird in Kürze eine Änderung am Bauteil durchgeführt. Anbei finden Sie die entsprechende PCN. Bei weiteren Fragen wenden Sie sich bitte an Ihren Vertriebsmitarbeiter.

Muster
Artikel Nr. Daten­blatt Simu­lation Downloads Status ProduktserieL1
(µH)
L2
(µH)
IR 1
(A)
IR 2
(A)
ISAT 1
(A)
RDC1 typ
(Ω)
RDC2 typ
(Ω)
RDC1 max
(Ω)
RDC2 max
(Ω)
fres
(MHz)
Typ Muster