GreenChip Synchronous Rectifier Controller
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GreenChip SMPS Primary Side Control IC with Fixed Frequency Operation
The TEA19362T is a member of the GreenChip family of controller ICs for switched mode power supplies. It is intended for flyback topologies to be used either standalone or together with smart charging controllers (like the TEA190x series) at the secondary side. It also offers improved compatibility with touch-screens. The built-in green functions provide high-efficiency at all power levels.
The TEA19362T is compatible with smart charging applications that require fixed frequency operation. Fixed-frequency operation minimizes Common-Mode Noise (CMN) and optimizes spectral purity towards the (mobile) touch screens. When used with a secondary-side controller IC, like the TEA190x series, it supports Constant Current (CC) mode down to 3 V output voltage.
At high power levels, the flyback can operate in Boundary Conduction Mode (BCM) depending on application components. For lowest CMN and highest spectral purity, the TEA19362T can be set to full Discontinuous Conduction Mode (DCM) operation. Switch-on, based on demagnetization sensing, enables steady operation at a constant frequency. In this way, a cleaner CMN spectrum is achieved.
At very low power levels, the controller uses burst mode to regulate the output power. A special optocoupler current reduction regulation has been integrated which reduces the average opto current in all modes to a minimum level. This reduction ensures high-efficiency at low power and excellent no-load power performance. As the switching frequency in this mode equals the nominal frequency (fsw) and the burst repetition rate is regulated to a fixed value, spectral purity is preserved and output ripple is limited. During the non-switching phase of the burst mode, the internal IC supply current is minimized for further efficiency optimization.
The TEA19362T includes a wide set of protections that are safe-restart protections. One of these protections is an accurate OverPower Protection (OPP). If the output is shorted, the system stops switching and restarts. The output power is then limited to a lower level. The TEA19362T is manufactured in a high-voltage Silicon-On-Insulator (SOI) process.
The SOI process combines the advantages of a low-voltage process (accuracy, highspeed protection, functions, and control). However, it also maintains the high-voltage capabilities (high-voltage start-up, low standby power, and brownin/brownout sensing at the input).
The TEA19362T enables low-cost, highly efficient and reliable supplies for power requirements up to 75 W using a minimum number of external components.
製品詳細
Features
General features
- SMPS controller IC supporting smart-charging applications and multiple-output-voltage applications
- Wide output range (5 V to 20 V in CV mode, 3 V to 20 V in CC mode, and 3 V to 6 V in direct charging mode)
- Fixed-frequency operation suited for mobile charger applications that require low CMN distortion and high spectral purity
- Housed in a small SO10 package
- Adaptive dual supply for highest efficiency over the entire output voltage range
- Integrated high-voltage start-up
- Continuous VCC regulation during start-up and protection via the HV pin, allowing a minimum VCC capacitor value
- Reduced opto current enabling low no-load power (20 mW at 5 V output)
- Fast transient response from 0 to full load
- Minimal output voltage ripple in all operating modes
- Integrated soft start
Green features
- Low supply current during normal operation (0.6 mA without load)
- Low supply current during the non-switching state in burst mode (0.25 mA)
- Demagnetization switching for minimum switching losses
Enables high-efficiency operation over a wide power range via:
Protection features
- Mains voltage compensated OverPower Protection (OPP)
- OverTemperature Protection (OTP)
- Integrated overpower time-out
- Integrated restart timer for system fault conditions
- Continuous mode protection using demagnetization detection
- Accurate OverVoltage Protection (OVP)
- General-purpose input for safe restart protection; for use with system OverTemperature Protection (OTP)
- Driver maximum on-time protection
- Brownin and brownout protection
All protections are safe-restart protections
NXP GreenChip
- This product is part of the NXP GreenChip portfolio, this program optimizes for energy efficiency in mobile and computing applications, specializing in high-power density, safety and reliability.
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ドキュメント
クイック・リファレンス ドキュメンテーションの種類.
設計・リソース
ソフトウェア
クイック・リファレンス ソフトウェア・タイプ.
1 ソフトウェア・ファイル
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CADおよびCAEソフトウェア
USB-PD3.0 / QC4.0 Smart Charging Design Tool
注: より快適にご利用いただくために、ソフトウェアのダウンロードはデスクトップで行うことを推奨します。