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TPS922050D1

Buck LED Driver

The TPS922050D1 is a buck led driver from Texas Instruments. View the full TPS922050D1 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Official TPS922050D1 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Texas Instruments

Category

Integrated Circuits

Package

WSON-8 2.0x2.0mm

TPS922050D1 Key Specifications

ParameterValue
Dimming SupportPWM
Integrated Mosfet300mΩ low-side NMOS
Input Voltage Range4.5V to 65V
Switching Frequency1MHz
Typical Current Limit1.5A
Operating Temperature Range-40°C to 125°C

TPS922050D1 Overview

Part: TPS922050D1DSGR — Texas Instruments

Type: Buck LED Driver

Description: 4.5 V to 65 V input, 1 A / 2 A non-synchronous buck LED driver with integrated 300 mΩ low-side NMOS, fast PWM dimming, and common-anode support.

Operating Conditions:

  • Supply voltage: 4.5 V to 63 V
  • Operating ambient temperature: -40 °C to 85 °C
  • Switching frequency: 1 MHz (TPS922050DSGR)

Absolute Maximum Ratings:

  • Max junction/storage temperature: 125 °C junction / 150 °C storage

Key Specs:

  • Switching FET on-resistance: 300 mΩ (VIN ≥ 5 V)
  • Switching FET cycle-by-cycle current limit: 1.4 A min, 1.6 A typ, 1.8 A max (TPS922050)
  • Switching frequency: 1.0 MHz typ (TPS922050DSGR)
  • Current sense reference voltage (VREF): 193 mV min, 200 mV typ, 207 mV max (VDIM = 2 V)
  • VIN undervoltage lockout rising threshold: 3.0 V min, 3.2 V typ, 3.4 V max
  • Internal LDO output voltage: 5.0 V min, 5.15 V typ, 5.3 V max (IVCC = 5 mA)
  • PWM low-level input voltage: 0.4 V max (D1 version)
  • PWM high-level input voltage: 1.2 V min (D1 version)
  • Thermal shutdown threshold: 165 °C (15 °C hysteresis)

Features:

  • Wide 4.5 V to 65 V input voltage range
  • LED common anode connection and single-layer PCB support
  • Integrated 300 mΩ low-side power MOSFET
  • Fast PWM dimming with minimum input pulse width down to 50 ns
  • Adaptive off-time current mode control
  • LED open/short and sense resistor open/short protection
  • Thermal shutdown protection

Applications:

  • Constant illumination (indoor/outdoor lighting, appliance lighting, emergency/signage, security floodlight, LCD backlight)
  • Instant illumination (machine vision, camera flash, fire alarm and strobe)

Package:

  • WSON-8 (2.0 mm × 2.0 mm)

TPS922050D1 Features

  • 4.5V to 65V wide input range
  • LED common anode connection
  • Integrated 300mΩ MOSFET:
  • -Typical current limit (1.6A / 3.2A)
  • -Switching frequency (400kHz / 1MHz)
  • Advanced dimming options:
  • -Analog dimming (200:1)
  • -Fast PWM dimming (50ns pulse width)
  • Full protection features:
  • -LED open and short protection
  • -Switching FET open and short protection
  • -External component failure protection
  • -Cycle-by-cycle current limit
  • -Thermal shutdown
  • Package: WSON-8, HVSSOP-8, SOT583

TPS922050D1 Applications

  • Constant illumination:
  • -Indoor and outdoor lighting
  • -Appliance lighting
  • -Cold/warm WLED lighting
  • -Emergency and signage lighting
  • -Security floodlight
  • -LED bulb and lamp
  • -LCD backlight
  • Instant illumination:
  • -Machine vision and camera flash
  • -Fire alarm and strobe

Simplified Schematic

TPS922050D1 Pin Configuration

  • SW 8

  • CSN 7

  • CSP 6

  • GND 1

  • COMP 5

  • 2 VIN

  • 3 DIM

  • 4 VCC

Thermal Pad

TPS922050D1 Electrical Characteristics

The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containingit. TJ = -40°C to +125°C, VIN = 7V, (unlessotherwise noted).

PARAMETERPARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUT SUPPLYINPUT SUPPLYINPUT SUPPLYINPUT SUPPLYINPUT SUPPLYINPUT SUPPLYINPUT SUPPLY
Rising V IN3.03.23.4V
V VIN_UVLOV IN undervoltage lockout
Hysteresis		Falling V IN2.83.0
0.2		3.2V
V
I OFFPWM off quiesent current from V INV DIM = 0V, device enabled1.01.3mA
I OPNormal operating current400kHz switching frequency2.3mA
I OPNormal operating current1MHz switching frequency3.5mA
V VCCInternal LDO output voltageI VCC = 5mA5.05.155.3V
I VCC_LIMInternal LDO output current limit152026mA
DIMMINGDIMMINGDIMMINGDIMMINGDIMMINGDIMMINGDIMMING
V PWM_LDIM low-level input voltage (D1 version)0.4V
V PWM_HDIM high-level input voltage (D1 version)1.2V
t PWM_OUT_ONPWM output minimum on time (D1 version)100ns
t PWM_IN_ONPWM input minimum on time (D1 verison)100ns
V ADIMDIM input voltage range (D2 version)02.2V
FEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIERFEEDBACK AND ERROR AMPLIFIER
g M(ea)Transconductance gainV DIM = 2V, V CSP-CSN = 200mV205265325μA/V
I COMPSource/sink currentV DIM = 2V, V CSP-CSN = 200mV ± 200mV±24±40±56μA
V REFCSP-CSN pin voltageV DIM = 2V193200207mV
V REFCSP-CSN pin voltageV DIM = 0.2V18.52021.5mV
I LEAK_CSP/NCSP+CSN pin leakage currentV IN = 60V, V DIM = 2V48μA
I LEAK_CSP/NCSP+CSN pin leakage currentV IN = 60V, V DIM = 0V15μA
POWER STAGEPOWER STAGEPOWER STAGEPOWER STAGEPOWER STAGEPOWER STAGEPOWER STAGE
R DSONSwitching FET on resistanceV IN ≥ 5V300mΩ
t min_ONSwitching FET minimum on time140160ns
t min_OFFSwitching FET minimum off time140160ns
f SWSwitching FET frequency (TPS922051, TPS922050DRLR)0.4MHz
f SWSwitching FET frequency (TPS922050DSGR, TPS922050DGNR)1.0MHz
CURRENT LIMITCURRENT LIMITCURRENT LIMITCURRENT LIMITCURRENT LIMITCURRENT LIMITCURRENT LIMIT
I LIMSwitching FET cycle-by-cycle current limit (TPS922050)1.41.61.8A
I LIMSwitching FET cycle-by-cycle current limit (TPS922051)2.83.23.6A
THERMAL PROTECTIONTHERMAL PROTECTION
Thermal shutdown temperature		THERMAL PROTECTIONTHERMAL PROTECTIONTHERMAL PROTECTION
165		THERMAL PROTECTIONTHERMAL PROTECTION
°C
T TSDHysteresis15°C

TPS922050D1 Absolute Maximum Ratings

over operating ambient temperature range (unless otherwise noted) (1)

MINMAXUNIT
Voltage on pins VIN, CSP, CSN, SW-0.365V
Voltage on pins VCC, DIM, COMP-0.35.5V
T JJunction temperature-40125°C
T stgStorage temperature-65150°C

TPS922050D1 Recommended Operating Conditions

over operating ambient temperature range (unless otherwise noted)

MINMAXUNIT
V INSupply voltage range4.563V
V SWSwitching node voltage range063V
V CSP , V CSNSense common-mode voltage range063V
V VCCLDO output voltage range05V
V DIMDimming voltage range05V
V COMPCompensation capacitor voltage range05V
T AOperating ambient temperature-4085°C

TPS922050D1 Thermal Information

METRIC (1)THERMALTPS922050/1 WSON - 8 PINSTPS922050/1 HVSSOP - 8 PINSTPS922050 SOT 8 PINSUNIT
R θJAJunction-to-ambient thermal resistance66.947.8113.1°C/W
R θJC(top)Junction-to-case (top) thermal resistance79.274.141.9°C/W
R θJBJunction-to-board thermal resistance31.120.424.0°C/W
ψ JTJunction-to-top characterization parameter2.24.61.0°C/W
ψ JBJunction-to-board characterization parameter31.120.423.6°C/W

www.ti.com

TPS922050D1 Typical Application

The TPS922050/1 is typically used as a Buck converter to drive one or more LEDs from an input from 4.5V to 63V range.

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
TPS922050D1DGNRTexas InstrumentsHVSSOP-8
TPS922050D1DRLRTexas InstrumentsSOT583-8
TPS922050D1DRLR.ATexas InstrumentsWSON-8
TPS922050D1DSGRTexas Instruments8-WFDFN Exposed Pad
TPS922050D1DSGR.ATexas InstrumentsWSON-8 2.0x2.0mm

Other Integrated Circuits

All Integrated Circuits datasheetsAll Texas Instruments datasheets (2,418)

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