Measure the resistance between Pin 1 (Drain) and Pin 2 (Source). A low resistance reading (close to 0 Ohms) indicates that the internal power MOSFET has suffered a catastrophic short-circuit failure.

: Features a frequency jittering circuit to further minimize EMI and a feedback mechanism for precise voltage regulation. Soft Start Functionality

The STR-F6267 is famously a key component in the power supply units (PSUs) of many Sony Trinitron CRT televisions, such as the KV-21FB140, KV-21FS140, KV-SW21M80, and the KV-BZ21 chassis series. In these devices, the IC serves as the primary SMPS controller, regulating the main B+ voltage and auxiliary supplies.

Minimizes component stress during power-up sequence. 2. Pin Configuration and Functions

If the IC has no voltage on Pin 4 despite the main filter capacitor being charged to roughly 300V DC, inspect the high-value startup resistors for open-circuit failure.

The STR-F6267 is a power management IC (PMIC) developed by Sanken Electric Co., Ltd. The datasheet PDF provides detailed information about the IC's features, specifications, and application notes. In this review, we'll take a closer look at the datasheet and provide an overview of the IC's capabilities.

| Parameter | Symbol | Rating | Unit | | :--- | :--- | :--- | :--- | | Drain-Source Voltage (MOSFET) | ( V_DSS ) | 800 | V | | Drain Current (Peak) | ( I_DP ) | 10 | A | | VCC Pin Voltage | ( V_CC ) | 32 | V | | Feedback Pin Voltage | ( V_FB ) | -0.3 to 9 | V | | Source Pin Sense Voltage | ( V_S/OCP ) | -0.3 to 5 | V | | Junction Temperature | ( T_j ) | -20 to +150 | °C | | Storage Temperature | ( T_stg ) | -40 to +125 | °C |

Industrial applications requiring robust switching power. Set-Top Boxes and DVD Players. Troubleshooting and Testing

Before designing a power supply, always verify the absolute maximum ratings. Exceeding these values can destroy the IC.

: Combines a power MOSFET and a current-mode PWM controller within a single package. Key Features High Efficiency : Capable of achieving efficiency up to 95%.

STR-F6267 Datasheet PDF: A Comprehensive Guide to Sanken’s Power IC

The on Pins 2, 4, and 5 if the circuit is safe to probe.

str f6267 datasheet pdf
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Str F6267 Datasheet Pdf Jun 2026