Understanding the STR-Z2062: A Guide for Power Supply Repair
If you are a technician or an electronics hobbyist, you have likely encountered the STR-Z2062. This IC is a specialized "Off-Line Switching Regulator" designed by Sanken Electric. It is commonly found in the power supply stages of consumer electronics, particularly in CRT and LCD televisions from brands like Sony, LG, and Samsung.
Because finding a clean datasheet can sometimes be a challenge, this post breaks down the essential technical details you need for troubleshooting and repair. What is the STR-Z2062?
The STR-Z2062 is a hybrid IC that combines a high-speed controller with a power MOSFET in a single package (usually a ZIP-15 style). Its primary job is to manage Pulse Width Modulation (PWM) to convert high-voltage DC into the stable voltages needed by the rest of the device. Pinout Configuration
When testing the IC, knowing the pin functions is critical. While there are 15 pins, the most important ones for diagnostic measurements are:
Pin 1 (Drain): Connected to the internal power MOSFET. This is the high-voltage side.
Pin 2 (Source): The source of the internal MOSFET, often connected to a current-sensing resistor.
Pin 4 (VCC): The power supply for the IC's internal control circuits. This usually requires around 16V to 18V to start up. Pin 5 (Ground): The common return path.
Pin 6 (Feedback): Receives the signal from the optocoupler to regulate the output voltage. Common Failure Symptoms
If your device is "dead" (no power, no standby light), the STR-Z2062 is a prime suspect. Common failure modes include:
Short Circuit: The internal MOSFET (Pins 1 and 2) shorts out, often blowing the main AC fuse.
No Startup: If Pin 4 (VCC) doesn't reach its "startup threshold" (often due to a failed startup resistor), the IC won't turn on.
Voltage Fluctuation: A faulty feedback loop (Pin 6) can cause the power supply to "chirp" or cycle on and off. Repair Tips
Check the "Startup Resistor": Before replacing the IC, check the high-wattage resistors connected to Pin 4. If they are open-circuit, the IC won't get the "kickstart" it needs. str-z2062 datasheet
Discharge Capacitors: Always discharge the large main filter capacitor (400V+) before touching the STR-Z2062 to avoid a nasty shock or blowing a new chip.
Use a Heat Sink: These chips run hot. Ensure the thermal paste is fresh and the screw is tight when installing a replacement. Where to Find the Datasheet
For the full electrical characteristics and circuit diagrams, you can typically find the official PDF on sites like AllDataSheet or DatasheetLib. Searching for the "Sanken STR-Z series" often yields better results if the specific Z2062 PDF is elusive, as many chips in this series share similar architectures.
The STR-Z2062 is commonly found in:
The STR-Z2062 datasheet is an essential resource for designing compact, efficient SMPS front-ends where integrating the switching transistor and control logic reduces board area and component count. Following its specifications and layout guidance helps ensure safe, compliant, and reliable power-supply designs.
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The STR-Z2062 is a specialized PWM (Pulse Width Modulation) controller integrated circuit (IC) that includes a built-in power switch, designed primarily for use in the power management units of laser printers. Manufactured by Sanken Electric Co., Ltd. , this IC is a critical component for stabilizing output voltages through pulse-width stabilization methods. Key Specifications and Features Go to product viewer dialog for this item.
is engineered to handle high-frequency switching tasks while maintaining efficiency in compact printer power supplies.
Function: PWM controller with a built-in power switch for DC power board supplies.
Package Type: SIP 15-pin (Single In-line Package), which allows for vertical mounting to save PCB space.
Output Wattage: Capable of supporting up to 100 Watts in specific printer configurations.
Protection: Features circuitry to prevent voltage drops or overload, ensuring stable power delivery to sensitive printer electronics. Typical Applications
This IC is widely utilized in the power supply boards (PSUs) of several popular HP and Canon laser printer models: Understanding the STR-Z2062: A Guide for Power Supply
HP LaserJet Series: M1005, 1200, 1300, 1150, 3015, 3020, and 3030. Canon Series: LBP 1210. Technical Breakdown of the SIP-15 Package
The 15-pin configuration is designed for complex power management, including feedback loops for voltage regulation and various safety triggers. While the specific pinout functions are detailed in the technical datasheet, typical SIP-15 power ICs of this series include pins for:
Drain/Source: Primary connections for the internal power MOSFET.
VCC: The supply voltage for the IC's internal control circuitry.
Feedback (FB): Used to monitor the output voltage and adjust the PWM duty cycle accordingly.
Overcurrent Protection (OCP): Senses current levels to prevent damage during a short circuit. Common Troubleshooting and Repair
When a printer fails to power on or experiences fluctuating power, the
is often the primary suspect. Technicians frequently replace this IC to fix "dead" power boards.
Symptoms of Failure: Printer not starting, intermittent power loss, or a high-pitched whining noise from the power supply.
Replacement: Because it is a 15-pin SIP component, replacement requires careful desoldering of the old chip and ensuring the new chip is securely soldered to avoid thermal issues or cold joints.
STR-Z2062 Datasheet
Overview
The STR-Z2062 is a power IC (integrated circuit) designed for use in switching power supplies, particularly in quasi-resonant (QR) and discontinuous conduction mode (DCM) flyback converters. Manufactured by Sanken Electric Co., Ltd., this IC aims to provide a highly efficient, compact, and reliable solution for power supply applications. Common Applications The STR-Z2062 is commonly found in:
Features
Specifications
Applications
The STR-Z2062 is suitable for various applications, including:
Functional Description
The STR-Z2062 integrates a power MOSFET, a quasi-resonant controller, and protections in a single package. It operates by controlling the switching of the MOSFET to regulate the output voltage. The quasi-resonant operation allows the converter to achieve high efficiency by minimizing switching losses.
Package Information
The STR-Z2062 is available in a standard 8-pin package, allowing for easy mounting on a printed circuit board (PCB).
Conclusion
The STR-Z2062 from Sanken Electric Co., Ltd. offers a comprehensive solution for designers looking to implement efficient, compact, and reliable power supplies. Its features, such as quasi-resonant operation, high breakdown voltage, and integrated protections, make it an ideal choice for a wide range of power supply applications.
Note: For detailed specifications, applications, and safety concerns, refer to the official datasheet provided by the manufacturer.
The STR-Z2062 is a Sanken Electric pulse width modulation (PWM) power management IC commonly utilized in the power supply units of older HP LaserJet (M1005, M1120) and Canon LBP1210 printers. Available in SIP-15 or ZIP-13 packages, it serves as a high-efficiency switching regulator featuring built-in power MOSFETs and protection functions. Technical details and specifications can be found at Jotrin Electronics Jotrin Electronics
STR-Z2062 SANKEN Integrated Circuits (ICs) - Jotrin Electronics
The STR-Z2062 is a Quasi-Resonant (QR) mode flyback converter IC designed for high-performance, compact, and highly efficient power supplies. This guide provides an overview of the STR-Z2062 datasheet, highlighting its key features, specifications, and typical applications.