EVALUATION KIT AVAILABLE MAX17595/MAX17596/ Peak-Current-Mode Controllers MAX17597 for Flyback and Boost Regulators General Description Benefits and Features The MAX17595MAX17597 is a family of peak-current- Programmable Switching Frequency Allows mode controllers for design of wide input-voltage flyback Optimization of the Magnetic and Filter Components, and boost regulators. The MAX17595 offers optimized Resulting in Compact, Cost-Effective, Efficient input thresholds for universal input AC-DC converters Isolated/Non-Isolated Power Supplies and telecom DC-DC (36V to 72V input range) power 100kHz to 1MHz Programmable Switching supplies. The MAX17596/MAX17597 offer input thresholds Frequency with Optional Synchronization suitable for low-voltage DC-DC applications (4.5V to 36V). Peak Current Mode Control Provides Excellent The MAX17597 implements a boost converter. All three Transient Response controllers contain a built-in gate driver for external - Offline (Universal Input AC) and Telecom (36V to n-channel MOSFETs. 72V) Flyback ControllerMAX17595 - DC-DC (4.5V to 36V) Flyback Controller The MAX17595MAX17597 house an internal error amplifier MAX17596 with 1% accurate reference, eliminating the need for an - Nonsynchronous (4.5V to 36V) Boost PWM external reference. The switching frequency is programma- ControllerMAX17597 ble from 100kHz to 1MHz with an accuracy of 8%, allow- ing optimization of magnetic and filter components, resulting 3mm x 3mm TQFN Package in compact and cost-effective power conversion. For Programmable Frequency Dithering Enables Low- EMI-sensitive applications, the MAX17595MAX17597 EMI Spread-Spectrum Operation family incorporates a programmable frequency dithering Integrated Protection Features Enhance System scheme, enabling low-EMI spread-spectrum operation. Reliability Users can start the power supply precisely at the desired Adjustable Current Limit with External Current- input voltage, implement input overvoltage protection, Sense Resistor and program soft-start time. A programmable slope com- Fast Cycle-By-Cycle Peak Current Limiting pensation scheme is provided to ensuree stability of the Hiccup-Mode Short-Circuit Protection peak-current-mode control scheme. Overtemperature Protection Hiccup-mode overcurrent protection and thermal Programmable Soft-Start and Slope Compensation shutdown are provided to minimize dissipation in Input Overvoltage Protection overcurrent and overtemperature fault conditions. Ordering Information/Selector Guide appears at end of Applications data sheet. Universal Input Offline AC-DC Power Supplies Wide-Range DC-Input Flyback/Boost Battery Chargers Battery-Powered Applications Industrial and Telecom Applications 19-6178 Rev 5 5/17MAX17595/MAX17596/ Peak-Current-Mode Controllers MAX17597 for Flyback and Boost Regulators Absolute Maximum Ratings V to SGND .........................................................-0.3V to +40V Maximum Input/Output Current (Continuous) IN V to SGND ................................ -0.3V to +16V (MAX17595) V , V .........................................................................100mA DRV IN DRV V to SGND ........ -0.3V to +6V (MAX17596 and MAX17597) NDRV (pulsed, for less than 100ns) .......................... 1.5A/-0.9A DRV NDRV to SGND ....................................-0.3V to +(V + 0.3)V Continuous Power Dissipation TQFN (single-layer board) DRV EN/UVLO to SGND ................................. -0.3V to +(V + 0.3)V (derate 20.8mW/NC above +70NC) ............................1666mW IN OVI, RT, DITHER, COMP, SS, FB, Operating Temperature Range ......................... -40NC to +125NC SLOPE to SGND ................................................... -0.3V to +6V Storage Temperature Range ............................ -65NC to +150NC CS to SGND ............................................................-0.8V to +6V Junction Temperature ......................................................+150NC PGND to SGND .................................................... -0.3V to +0.3V Lead Temperature (soldering, 10s) .................................+300NC Soldering Temperature (reflow) .......................................+260NC Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Package Thermal Characteristics (Note 1) Junction-to-Ambient Thermal Resistance ( q ) ..............48C/W Junction-to-Case Thermal Resistance ( q ) .....................7C/W JA JC Note 1: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Electrical Characteristics (V = 12V (for the MAX17595, bring V up to 21V for startup), V = V = V = V = V = V = V = 0V, IN IN CS SLOPE DITHER FB OVI SGND PGND V = +2V NDRV, SS, COMP are unconnected, R = 25k, C = 1F, C = 1F, T = T = -40C to +125C, unless EN/UVLO RT VIN VDRV A J otherwise noted. Typical values are at T = T = +25C.) (Note 2) A J PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (V ) IN MAX17595 8 29 V Voltage Range V V IN IN MAX17596/MAX17597 4.5 36 MAX17595 18.5 20 21.5 V Bootstrap UVLO IN V V rising V IN-UVR IN Wakeup MAX17596/MAX17597 3.8 4.1 4.4 MAX17595 6.5 7 7.5 V Bootstrap UVLO IN V V falling V IN-UVF IN Shutdown Level MAX17596/MAX17597 3.6 3.9 4.2 V Supply Startup Current I IN VIN- V < UVLO 20 32 FA IN (Under UVLO) STARTUP V Supply Shutdown IN I V = 0V 20 32 FA IN-SH EN Current V Supply Current I Switching, f = 400kHz 2 mA IN IN-SW SW MAX17595, I = 2mA sinking, V = 0V (Note VIN EN V Clamp Voltage V 30 33 36 V IN INC 3) ENABLE (EN) V V rising 1.16 1.21 1.26 ENR EN EN Undervoltage Threshold V V V falling 1.1 1.15 1.2 ENF EN EN Input Leakage Current I V = 1.5V, T = +25NC -100 +100 nA EN EN A Maxim Integrated 2 www.maximintegrated.com