規格
| 屬性 | 價值 |
| Supplier | Texas Instruments,Rochester Electronics, LLC |
| Package | Tape & Reel (TR),Cut Tape (CT),Bulk |
| ProductStatus | Not For New Designs |
| OutputType | Transistor Driver |
| Function | Step-Down |
| OutputConfiguration | Positive |
| Topology | Buck |
| NumberofOutputs | 1 |
| OutputPhases | 1 |
| Voltage-Supply(Vcc/Vdd) | 2.25V ~ 5.5V |
| Frequency-Switching | 100kHz ~ 1MHz |
| DutyCycle(Max) | 95% |
| SynchronousRectifier | Yes |
| ClockSync | Yes |
| ControlFeatures | Current Limit, Enable, Frequency Control, Power Good, Soft Start |
| OperatingTemperature | -40°C ~ 85°C (TA) |
| MountingType | Surface Mount |
| Package/Case | 16-PowerTSSOP (0.173, 4.40mm Width) |
概述
Description
TPS40021PWPR is a Texas Instruments switch‑mode power‑supply controller (PWM controller) used to regulate DC‑DC and AC‑DC supplies and LED drivers. It provides fixed‑frequency PWM with current‑mode control to drive an external MOSFET, supporting simple topologies such as buck, boost, and flyback. Key features typically include start‑up/soft‑start sequencing, overcurrent/short‑circuit protection, undervoltage lockout, fault signaling, and flexibility via feedback networks. The PWPR suffix indicates TI’s tape‑and‑reel packaging. Applications include compact power supplies, LED drivers, and battery chargers. For exact electrical specs, operating ranges, and application notes, consult the TPS40021 datasheet and TI product page.
Features
TPS40021PWPR features (concise):
- High-voltage LED driver/controller with integrated switch (constant-current buck topology)
- Wide input range: up to about 65 V (suitable for automotive/general lighting)
- Constant-current regulation for LED string via sense resistor and feedback
- Current-mode control with fixed oscillator frequency
- Dimming support: PWM dimming input (and options for analog/linear dimming via feedback)
- Soft-start to limit inrush and prevent LED surge
- Protection and fault handling: UVLO, OVP, OCP, LED-open/short protection, thermal shutdown with fault latch and auto-retry
- Compact 8-pin PW package (PWPR) for small LED driver designs
- Suitable for automotive and general-purpose LED lighting applications
Note: For exact electrical specs and pinout, consult the TI datasheet.
- High-voltage LED driver/controller with integrated switch (constant-current buck topology)
- Wide input range: up to about 65 V (suitable for automotive/general lighting)
- Constant-current regulation for LED string via sense resistor and feedback
- Current-mode control with fixed oscillator frequency
- Dimming support: PWM dimming input (and options for analog/linear dimming via feedback)
- Soft-start to limit inrush and prevent LED surge
- Protection and fault handling: UVLO, OVP, OCP, LED-open/short protection, thermal shutdown with fault latch and auto-retry
- Compact 8-pin PW package (PWPR) for small LED driver designs
- Suitable for automotive and general-purpose LED lighting applications
Note: For exact electrical specs and pinout, consult the TI datasheet.
Pinout
- Pin count: 8 pins (PWPR; MSOP/8-pin package)
- Function: TPS40021PWPR is a high-side switch / smart power switch with built-in current limit and protection (thermal shutdown). It’s used to power and protect a load in DC-DC/LED driver applications by controlling a switchable supply path.
- Function: TPS40021PWPR is a high-side switch / smart power switch with built-in current limit and protection (thermal shutdown). It’s used to power and protect a load in DC-DC/LED driver applications by controlling a switchable supply path.
Manufacturer
- Manufacturer: Texas Instruments (TI).
- What kind of company: TI is a global American semiconductor company that designs and manufactures analog and embedded processing integrated circuits, including power-management and other semiconductor devices.
- What kind of company: TI is a global American semiconductor company that designs and manufactures analog and embedded processing integrated circuits, including power-management and other semiconductor devices.
Application
TPS40021PWPR is used in off-line switch-mode power supplies. Typical application areas include:
- LED lighting drivers (constant-current, dimmable or non-dimmable)
- Off-line AC-DC adapters and chargers (wall worts, USB adapters)
- Small isolated SMPS for consumer electronics (set-top boxes, AV receivers, etc.)
- Standby/battery-charging power supplies for household appliances
These applications benefit from its high-voltage startup and integrated control for compact, efficient, low-cost power solutions.
- LED lighting drivers (constant-current, dimmable or non-dimmable)
- Off-line AC-DC adapters and chargers (wall worts, USB adapters)
- Small isolated SMPS for consumer electronics (set-top boxes, AV receivers, etc.)
- Standby/battery-charging power supplies for household appliances
These applications benefit from its high-voltage startup and integrated control for compact, efficient, low-cost power solutions.
Package
TPS40021PWPR is in an 8-pin VSSOP (Very Small Outline Package).
