STCH02 STMicroelectronics

STCH02 Offline PWM controller for ultra-low standby adapters Datasheet - production data Description The STCH02 is a PWM quasi resonant controller specifically designed for ultra-low standby power supplies. The built-in HV start-up cell with zero power SO-8 consumption, the fully integrated blocks for primary side constant current output regulation and the advanced power management make this Features IC the best choice to build a high efficiency and ultra-low standby consumption power supply, with Advanced power management for ultra-low high overall and excellent dynamic performances. standby power consumptions (under 10 mW at 230 Vac) Figure 1. Typical application Fully integrated primary side constant current UV output regulation (CC) */ 650 V embedded HV start-up circuit with zero power consumption. */ Quasi resonant (QR) zero voltage switching (/ % (ZVS) operation Automatic self-supply % / 7) ) 45 Accurate and adjustable output OVP with 4&/4 & % 7%% autorestart after fault Input voltage feedforward compensation for mains-independent CC regulation Intelligent frequency jitter for EMI suppression SO-8 package Table 1. Device summary Applications Order code Package Packing AC-DC chargers for smartphones, tablets, STCH02 Tube camcorders and other handheld equipment SO-8 STCH02TR Tube and reel AC/DC adapters for STB, notebooks and auxiliary power supplies November 2016 DocID028766 Rev 4 1/24 This is information on a product in full production. www.st.com. (% (/ 7PContents STCH02 Contents 1 Device description and block diagram 3 2 Typical circuit . 10 3 Application information . 11 3.1 Gate driver 12 3.2 Frequency jittering for EMI reduction 12 3.3 High voltage start-up generator 12 3.4 Zero current detection and triggering block . 13 3.5 Constant voltage operation . 15 3.6 Constant current operation 15 3.7 Voltage feedforward block 16 3.8 Burst mode operation 17 3.9 Adaptive UVLO . 18 3.10 Overvoltage protection . 18 3.11 Soft-start and starter block 19 3.12 Hiccup mode OCP 19 4 Package information 21 4.1 SO-8 package information 21 5 Revision history . 23 2/24 DocID028766 Rev 4