Infineon Technologies TDA48632XKLA1

Overview

TDA48632XKLA1 from Infineon Technologies is a Power-Factor Correction (PFC) boost controller IC designed for active harmonic filtering in universal-input AC-DC power supplies. It delivers near-unity power factor (>0.99), <5% THD at 110 W output, and supports discontinuous conduction mode (DCM) via integrated zero-current detection. The device drives external MOSFETs up to 20 A and features internal leading-edge blanking, overvoltage protection (OVR = 5.4 V), and undervoltage lockout (UVLO turn-on = 12.5 V).

For engineers reviewing the TDA48632XKLA1 datasheet, TDA48632XKLA1 pinout, TDA48632XKLA1 application, or TDA48632XKLA1 equivalent, key selection criteria include its 8-pin PG-DIP-8-4 package, 2.2 V VAOUT inhibition threshold, 0.85 V gate-driver low-level output, 2 µs voltage amplifier delay (t_dVA), and compatibility with universal input (85–265 V_AC) PFC stages requiring stable DC bus regulation.

Technical Context

The TDA48632XKLA1 implements a voltage-mode controlled boost PFC architecture with an internal error amplifier integrating VAOUT feedback, a two-input analog multiplier (VSENSE-derived reference × MULTIN-sensed line voltage), and a current-sense comparator with 150 ns response time (t_res). Its zero-current detector (DETIN) enables precise DCM timing, while the totem-pole GTDRV output provides 0.85 V logic-low drive for enhanced MOSFET gate control during shutdown.

Functional blocks include a 5 V-clamped VAOUT node, 1 V OVR threshold referenced to VSENSE, 2.5 V UVLO hysteresis, and internal 70 ns shutdown delay (t_dsd). The IC operates with 20 µA startup current and integrates leading-edge blanking (LEB) on ISENSE to suppress switching noise-induced false triggering.

Key Specifications

Pinout & Package

Package: PG-DIP-8-4 (Plastic Dual-In-Line, 8-pin, 400 mil width, through-hole mount).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PFC controller applications.

Compared with ICE2PCS01 and UCC28019, the TDA48632XKLA1 uniquely integrates zero-current detection and DCM-optimized gate drive, delivering lower THD at partial load and eliminating external ZCD components-critical for compact, high-efficiency universal-input PFC stages.

Availability

TDA48632XKLA1 is available at Aetrix Electronics and suitable for LED street lighting power supplies, industrial AC-DC front-ends, medical imaging equipment PSUs, and server rack power distribution units requiring stable component supply and long-term design-in support.

Supply support for TDA48632XKLA1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and manufacturing infrastructure.

The TDA48632XKLA1 belongs to Infineon's legacy PFC controller product line, engineered specifically for cost-effective, high-power-factor AC-DC conversion in universal-input offline power supplies up to 300 W.

FAQ

What is the recommended VSENSE divider ratio for a 400 V DC output?

For a 400 V DC output, use a resistive divider yielding 2.5 V at VSENSE (e.g., 1 MΩ top + 6.8 kΩ bottom). This matches the internal 2.5 V reference and ensures accurate regulation. The VAOUT integrator capacitor must be selected per datasheet Figure 4 to maintain phase margin and transient response.

How does the DETIN pin interface with the boost inductor auxiliary winding?

DETIN connects to an auxiliary winding wound with 1:10 turns ratio relative to the main boost inductor. A 100 kΩ pull-down resistor and 1 nF RC snubber suppress ringing. The internal comparator triggers GTDRV turn-on when DETIN voltage crosses 0.5 V rising, indicating true zero-current crossing.

Can TDA48632XKLA1 operate in continuous conduction mode (CCM)?

No - the TDA48632XKLA1 is optimized for discontinuous conduction mode (DCM) only. Its zero-current detector, fixed peak-current control, and lack of slope compensation make it unsuitable for CCM operation. For CCM, Infineon's ICE2PCS01 or UCC28019 are appropriate alternatives.

What is the maximum allowable VCC supply ripple for stable operation?

VCC ripple must remain below 1 V_PP at 100 kHz. Use a 10 µF electrolytic capacitor in parallel with a 100 nF ceramic capacitor directly at the VCC pin. Excessive ripple causes UVLO chatter and intermittent GTDRV dropout, especially during line dips.