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TPS922050/1

Buck LED Driver

The TPS922050/1 is a buck led driver from Texas Instruments. View the full TPS922050/1 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

TPS922050/1 shares its datasheet with TPS922050, whose page lists every part number it covers.

Official TPS922050/1 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Texas Instruments

Category

Buck LED Driver

TPS922050/1 Key Specifications

ParameterValue
Dimming ModesPWM and Analog
Output Current1A / 2A
Input Voltage Range4.5V to 65V
Switching Frequency400kHz / 1MHz
Operating Junction Temperature-40°C to 125°C

TPS922050/1 Overview

Part: TPS922050/TPS922051 — Texas Instruments

Type: Non-synchronous Buck LED Driver

Description: 4.5–65 V input, 1 A / 2 A class buck LED driver with integrated 300 mΩ low-side MOSFET, 400 kHz / 1 MHz switching, and PWM or analog dimming.

Operating Conditions:

  • Supply voltage: 4.5–63 V (recommended operating range)
  • Operating ambient temperature: -40 to 85 °C
  • Switching frequency: 400 kHz (TPS922051, TPS922050DRLR) or 1 MHz (TPS922050DSGR/DGNR)
  • Junction temperature: -40 to 125 °C

Absolute Maximum Ratings:

  • Voltage on VIN, CSP, CSN, SW: -0.3 to 65 V
  • Voltage on VCC, DIM, COMP: -0.3 to 5.5 V
  • Junction temperature: -40 to 125 °C
  • Storage temperature: -65 to 150 °C

Key Specs:

  • Cycle-by-cycle current limit: 1.4/1.6/1.8 A min/typ/max (TPS922050); 2.8/3.2/3.6 A (TPS922051)
  • Switching FET R_DSON: 300 mΩ typ (VIN ≥ 5 V)
  • CSP–CSN reference voltage: 200 mV typ (193–207 mV) at VDIM = 2 V; 20 mV typ at VDIM = 0.2 V
  • UVLO: 3.2 V typ rising, 3.0 V typ falling
  • Quiescent current (VDIM = 0 V, enabled): 1.0 mA typ, 1.3 mA max
  • Operating current: 2.3 mA typ at 400 kHz; 3.5 mA typ at 1 MHz
  • Internal LDO (VCC): 5.15 V typ at 5 mA; current limit 20 mA typ
  • Minimum on/off time: 140 ns typ, 160 ns max
  • Error amplifier transconductance: 265 μA/V typ
  • Thermal shutdown: 165 °C typ, 15 °C hysteresis

Features:

  • 4.5 V to 65 V wide input range
  • Common anode LED connection
  • Analog dimming (200:1) and fast PWM dimming (50 ns pulse width)
  • LED open/short protection
  • Switching FET open/short protection
  • External component failure protection
  • Cycle-by-cycle current limit
  • Thermal shutdown
  • D1 version for PWM dimming, D2 version for analog dimming (DIM range 0–2.2 V)

Applications:

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

Package:

  • WSON-8 (2.0 mm x 2.0 mm)
  • HVSSOP-8 (3.0 mm x 3.0 mm)
  • SOT583-8 (2.0 mm x 1.2 mm)

TPS922050/1 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

TPS922050/1 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

TPS922050/1 Pin Configuration

  • SW 8

  • CSN 7

  • CSP 6

  • GND 1

  • COMP 5

  • 2 VIN

  • 3 DIM

  • 4 VCC

Thermal Pad

TPS922050/1 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

TPS922050/1 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

TPS922050/1 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

TPS922050/1 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

TPS922050/1 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
TPS922050Texas Instruments—
TPS922050D1Texas InstrumentsWSON-8 2.0x2.0mm
TPS922050D2Texas InstrumentsWSON-8 2.0x2.0mm
TPS922050DGNRTexas InstrumentsHVSSOP-8
TPS922050DRLRTexas InstrumentsWSON-8
TPS922050DSGRTexas InstrumentsWSON-8

More datasheets

All Texas Instruments datasheets (2,437)

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