Power Integrations CAP200DG-TL

Overview

CAP200DG-TL from Power Integrations is a CAPZero-2 zero-loss automatic X capacitor discharge IC for AC-DC power supplies and offline converters. The device blocks current through the X-capacitor discharge resistor path while AC is present and automatically connects the discharge path after AC is removed, helping designers meet safety discharge requirements without adding continuous standby loss.

As part of the Power Integrations CAPZero-2 family, CAP200DG-TL combines two-terminal operation, self-powered high-voltage switching, 1000V internal MOSFET capability, very low consumption at 230VAC, and support for X capacitor values from 100nF to 6uF. For engineers reviewing the CAP200DG-TL datasheet, CAP200DG-TL pinout, CAP200DG-TL application, or CAP200DG-TL equivalent, this IC is commonly used in adapters, appliances, chargers, LED drivers, power supplies, and other AC input systems that require low no-load power.

Technical Context

In an offline AC-DC converter, the X capacitor in the EMI filter must be discharged after the mains input is disconnected. A traditional resistor-only discharge network creates continuous loss while the product is connected to AC power. CAP200DG-TL solves this by interrupting the discharge resistor current during normal operation and reconnecting the path when the AC line is removed.

The device is especially useful where standby power regulations, EuP Lot 6 targets, or low no-load consumption requirements are important. Its two-terminal structure also keeps the circuit simple because no auxiliary bias winding, microcontroller command, or ground reference is required.

CAP200DG-TL is typically placed around the X capacitor discharge network in adapters, open-frame power supplies, consumer appliances, industrial AC-DC modules, chargers, and LED power products where EMI filter flexibility and standby power reduction must be balanced.

Key Specifications

Pinout & Package

The CAP200DG-TL pinout is intentionally simple because the IC behaves as a two-terminal high-voltage switch placed in series with the X capacitor discharge resistor network. The SO-8 package supports the creepage and layout spacing needed around mains-connected nodes.

For PCB layout, the discharge resistor path, X capacitor terminals, and AC input spacing should follow the safety requirements of the end product. The CAP200DG-TL package and resistor network should be placed so the high-voltage nodes remain separated from low-voltage control and SELV circuitry.

Key Features

• Automatic X capacitor discharge function reduces standby loss from conventional resistor-only networks.
• Two-terminal, self-supplied operation simplifies implementation in AC input EMI filters.
• Supports X capacitor values from 100nF to 6uF for flexible differential-mode EMI design.
• 1000V internal MOSFET capability supports robust mains-connected applications.
• Less than 5mW consumption at 230VAC supports low no-load power supply requirements.
• SO-8 package supports compact surface-mount power supply layouts.

Applications

Equivalent & Alternatives

When evaluating a CAP200DG-TL equivalent, engineers should compare X capacitor range, internal high-voltage rating, standby consumption, package creepage, safety certification status, and resistor-value design rules.

Compared with resistor-only discharge solutions, CAP200DG-TL reduces continuous AC-line power loss. CAP200DG-TL vs other CAPZero-2 variants should be selected from the official component table according to the X capacitor and total series resistance used in the design.

Quality

CAP200DG-TL should be sourced as original Power Integrations components through traceable supply channels. Quality checks may include SO-8 package inspection, top-mark validation, solderability testing, moisture handling review, and verification against the official CAPZero-2 datasheet.

Production validation should include X capacitor discharge timing, no-load input power, surge and safety spacing review, thermal behavior, and compliance testing under the target AC input and safety standard conditions.

Availability

CAP200DG-TL available at Aetrix Electronics and is suitable for AC-DC adapters, appliances, LED drivers, chargers, and offline converters requiring automatic X capacitor discharge and very low standby loss.

Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term support for power supply manufacturers and OEM programs.

For production builds, confirming the CAPZero-2 family member, SO-8 footprint, X capacitor value, discharge resistor range, lead time, lifecycle status, and sourcing continuity helps reduce design and procurement risk.

Manufacturer

Power Integrations is a semiconductor manufacturer focused on high-voltage power conversion ICs and power supply technologies for offline conversion, LED lighting, motor drives, adapters, appliances, and industrial power systems.

The company's product families support energy-efficient AC-DC and high-voltage power designs using integrated switching, protection, control, and power-management functions.

FAQ

What is CAP200DG-TL used for?

CAP200DG-TL is used to automatically discharge X capacitors in AC input EMI filters while reducing standby power loss during normal AC operation.

Where can I find the CAP200DG-TL datasheet download?

The CAP200DG-TL datasheet is available from Power Integrations as part of the CAPZero-2 family datasheet and includes the component table, operating description, package information, and application guidance.

What should be considered in CAP200DG-TL pinout design?

Designers should treat the device as a mains-connected two-terminal discharge control IC and maintain proper creepage, clearance, resistor ratings, and AC input safety spacing.

Does CAP200DG-TL need an external bias supply?

No. CAP200DG-TL is self-supplied and does not require an external bias supply or ground reference.

What are common CAP200DG-TL equivalent solutions?

Common alternatives include other Power Integrations CAPZero-2 family members such as CAP002DG-TL or CAP004DG-TL selected according to X capacitor value and discharge resistor requirements.