TNY174-180 TinySwitch-LT Family Energy Efficient, Offline Switcher with Enhanced Flexibility and Extended Power Range Product Highlights + AC Lowest System Cost with Enhanced Flexibility Input 650 V rating optimized for non-active PFC applications DC Simple ON/OFF control, no loop compensation needed Output Selectable current limit through BP/M capacitor value Higher current limit extends peak power or, in open frame D applications, maximum continuous power EN Lower current limit improves efficiency in enclosed adapters/ TinySwitch-LT BP/M chargers Allows optimum TinySwitch-LT choice by swapping S devices with no other circuit redesign 2 Tight I f parameter tolerance reduces system cost PI-4770-010709 Maximizes MOSFET and magnetics power delivery Figure 1. Typical Application. Minimizes max overload power, reducing cost of transformer, primary clamp & secondary components ON-time extension extends low-line regulation range/hold-up time to reduce input bulk capacitance Output Power Table Self-biased: no bias winding or bias components 230 VAC 15% 85-265 VAC Frequency jittering reduces EMI filter costs Pin-out simplifies heat sinking to the PCB 3 Peak or Peak or Product 1 1 Adapter Open Adapter Open SOURCE pins are electrically quiet for low EMI 2 2 Frame Frame Enhanced Safety and Reliability Features 4 TNY174P/D 6 W 11 W 5 W 8.5 W Accurate hysteretic thermal shutdown protection with 4 TNY175P/D 8.5 W 15 W 6 W 11.5 W automatic recovery eliminates need for manual reset Auto-restart delivers <3% of maximum power in short-circuit and 4 TNY176P/D 10 W 19 W 7 W 15 W open loop fault conditions 4 TNY177P 13 W 23.5 W 8 W 18 W Output overvoltage shutdown with optional Zener Very low component count enhances reliability and enables TNY177D 11.5 W 23.5 W 7 W 18 W single-sided printed circuit board layout TNY178P 16 W 28 W 10 W 21.5 W High bandwidth provides fast turn on with no overshoot and TNY178D 14.5 W 26 W 9 W 19.5 W excellent transient load response Extended creepage between DRAIN and all other pins improves field TNY179P 18 W 32 W 12 W 25 W reliability TNY180P 20 W 36.5 W 14 W 28.5 W EcoSmart Extremely Energy Efficient Table 1. Output Power Table. Easily meets all global energy efficiency regulations Notes: No-load <150 mW at 265 VAC without bias winding, 1. Minimum continuous power in a typical non-ventilated enclosed adapter measured at +50 C ambient. Use of an external heat sink will increase <50 mW with bias winding power capability. ON/OFF control provides constant efficiency down to very light loads 2. Minimum peak power capability in any design or minimum continuous power ideal for mandatory CEC regulations in an open frame design (see Key Applications Considerations). 3. Packages: P: DIP-8C, D: SO-8C. See Part Ordering Information. Applications 4. See Key Application Considerations. Chargers/adapters for cell/cordless phones, PDAs, digital cameras, MP3/portable audio, shavers, etc. DVD/PVR and other low power set top decoders Supplies for appliances, industrial systems, metering, etc. Description TinySwitch-LT incorporates a 650 V power MOSFET, oscillator, high-voltage switched current source, current limit (user selectable) and thermal shutdown circuitry. The IC family uses an ON/OFF control scheme and offers a design flexible solution with a low system cost and extended power capability. www.power.com August 2016TNY174-180 BYPASS/ DRAIN MULTI-FUNCTION (D) (BP/M) REGULATOR 5.85 V 115 A FAULT BYPASS PIN PRESENT UNDER-VOLTAGE + AUTO- BYPASS - RESTART CAPACITOR COUNTER 5.85 V SELECT AND V I LIMIT 4.9 V CURRENT RESET LIMIT STATE MACHINE CURRENT LIMIT COMPARATOR ENABLE JITTER CLOCK 1.0 V + V T THERMAL DC MAX SHUTDOWN ENABLE (EN) OSCILLATOR 1.0 V S Q R Q LEADING EDGE OVP BLANKING LATCH SOURCE (S) PI-4771-090313 Figure 2. Functional Block Diagram. Pin Functional Description P Package (DIP-8C) DRAIN (D) Pin: This pin is the power MOSFET drain connection. It provides internal EN 1 8 S operating current for both start-up and steady-state operation. BP/M 2 7 S BYPASS/MULTI-FUNCTION (BP/M) Pin: This pin has multiple functions: 6 S 1. It is the connection point for an external bypass capacitor for the D Package (SO-8C) internally generated 5.85 V supply. 4 5 D S 2. It is a mode selector for the current limit value, depending on the EN 1 8 S value of the capacitance added. Use of a 0.1 mF capacitor results in the standard current limit value. Use of a 1 mF capacitor BP/M 2 7 S results in the current limit being reduced to that of the next 6 S smaller device size. Use of a 10 mF capacitor results in the current limit being increased to that of the next larger device size D 4 5 S for TNY175-180. 3. It provides a shutdown function. When the current into the PI-4772-090313 bypass pin exceeds I , the device latches off until the SD Figure 3. Pin Configuration. BP/M voltage drops below 4.9 V, during a power-down. This can be used to provide an output overvoltage function with a Zener connected from the BP/M pin to a bias winding supply. 2 Rev. G 08/16 www.power.com + -