Str F6267 Datasheet Pdf

is engineered to simplify primary-side power supply design while maximizing conversion efficiency (up to 95% under optimal conditions). Below are the prominent features outlined in the datasheet: STRF6267 Sk | | Xecor

Connected to the internal power MOSFET drain. Connects to the primary winding of the flyback transformer. Source (S)

): Single pulse, non-repetitive limit. Refer to the manufacturer's exact curves for breakdown thresholds. +150 °C Storage Temperature Range ( Tstgcap T sub s t g end-sub ): -40 °C to +125 °C 4. Internal Architecture and Functional Block Diagram

The is a single-channel high-side switch designed using STMicroelectronics’ proprietary VIPower™ M0-5 technology . It is engineered to drive incandescent lamps, LEDs, and resistive loads in automotive and industrial applications. The device integrates robust protection features and advanced diagnostics, making it ideal for modern body control modules (BCM) and lighting systems.

The STR-F6267 utilizes a 5-pin configuration. Proper connection of these pins is vital for circuit stability and to prevent catastrophic failure during high-voltage operations. Pin Number Description str f6267 datasheet pdf

Includes built-in Overcurrent Protection (OCP), Overvoltage Protection (OVP), and Thermal Shutdown (TSD).

The is a highly efficient, off-line switching regulator integrated circuit (IC) manufactured by Sanken Electric Co., Ltd. , designed specifically for Switched-Mode Power Supplies (SMPS) and quasi-resonant flyback converter applications . By combining a primary control and drive circuit with an avalanche-guaranteed power MOSFET on a single monolithic chip, this IC radically reduces external component counts, simplifies PCB layout design, and improves thermal efficiency. STR-F6267 SANKEN Discrete Semiconductors

| Symptom | Likely cause per datasheet | Solution | |------------------------------|-----------------------------------------------------|--------------------------------------------| | No startup, VCC oscillates | VCC startup capacitor too small or leakage | Increase to 47µF, check startup resistor | | Supply shuts down under load | Current sense resistor too large (false OCP) | Reduce resistor value (e.g., 0.33Ω→0.27Ω) | | Blown IC | Drain overvoltage spike exceeding 650V | Improve snubber, check transformer leakage | | Intermittent restart | Overload protection triggered by noise on FB pin | Add 100pF capacitor from FB to GND |

The STR-F6267 belongs to Sanken's premier line of power ICs designed to achieve high efficiency and low electromagnetic interference (EMI) noise. Specification / Feature Sanken Electric Co., Ltd. Topology Off-line Flyback Switching Regulator Control Mode Current-Mode PWM 控制 (Pulse Width Modulation) Package Style 5-Pin SIP / TO-3P Modified Efficiency Rating Up to 95% under optimal loads Key Features Built-in Frequency Jittering, Soft Start, Thermal Shutdown Pinout Configuration and Functional Descriptions is engineered to simplify primary-side power supply design

: Shuts down the IC if internal temperatures exceed safe operating limits. ⚖️ Pros & Cons

This IC stands out because it integrates a high-voltage and a current-mode PWM controller into a single, compact package. This integration not only reduces the number of external components required but also streamlines the design process, leading to more reliable and efficient power supplies.

The Sanken STR-F6267 is a powerful and efficient solution for offline switching power supplies, especially in quasi-resonant designs. Its high level of integration, combining a power MOSFET, control logic, and protection features, allows for reliable and compact power supply units.

| Parameter | Symbol | Rating | Unit | |-----------|--------|--------|------| | Drain-Source Voltage (MOSFET) | VDSS | 650 | V | | Peak Drain Current (Pulse) | IDP | 12 | A | | Continuous Drain Current (TC=25°C) | ID | 5.5 | A | | VCC Supply Voltage | VCC | 32 | V | | FB Pin Input Voltage | VFB | -0.3 to 7 | V | | Peak VCC Clamp Current | ICC | 10 | mA | | Operating Junction Temperature | Tj | -20 to +125 | °C | | Storage Temperature | Tstg | -40 to +125 | °C | Source (S) ): Single pulse, non-repetitive limit

When you download the , focus on the following sections:

: Historically prevalent in TV and VCR power regulator circuits (e.g., JVC units).

When diagnosing power supply boards utilizing the STR-F6267, several common failure modes present themselves: