Tsum1pfr-lf Datasheet !free! <2024-2026>

Supports DVI or HDMI (depending on the specific hardware revision and licensing).

If the Tsum1pfr-lf is the adjustable version, you need an external resistor divider from VOUT to FB (feedback) to GND. Tsum1pfr-lf Datasheet

In the world of electronic design, encountering an unfamiliar part number like is not uncommon. This alphanumeric string suggests a specific component—likely a low-frequency (LF) power filter, a voltage regulator, or a protection IC. The "Tsum" prefix may indicate a custom or proprietary device from a smaller semiconductor house, while "pfr" often hints at Power Factor Regulator or Pulse Frequency Regulator . The "-lf" suffix typically denotes Lead-Free or Low Frequency compliance. Supports DVI or HDMI (depending on the specific

| Parameter | Condition | Min | Typ | Max | Unit | | :--- | :--- | :--- | :--- | :--- | :--- | | Supply Current (startup) | Before switching | - | 50 | 100 | µA | | Supply Current (operating) | fsw=65kHz, no load | 1.5 | 2.5 | 3.5 | mA | | UVLO Turn-On Threshold | VCC rising | 10.5 | 11.2 | 11.8 | V | | UVLO Hysteresis | - | - | 1.5 | - | V | | Reference Voltage (FB) | TA=25°C | 2.475 | 2.500 | 2.525 | V | | Oscillator Frequency | RT=100kΩ to GND | 50 | 65 | 80 | kHz | | Maximum Duty Cycle | - | 85 | 92 | 95 | % | | CS Trip Voltage | Overcurrent limit | 0.48 | 0.50 | 0.52 | V | | Output Rise Time | CLOAD=1nF | - | 40 | 80 | ns | | Parameter | Condition | Min | Typ