TSM006

TSM006 Primary PWM Controller s s s s s s s s s s s s s s Current-mode PWM Controller High-current output drive suitable for Power MOSFET Automatic burst mode in zero-load condition Primary overcurrent protection (hiccup mode) Internal leading edge blanking on current sense External slope compensation capability Programmable soft start Frequency modulation for low emi Accurate oscillator frequency 77% duty cycle limitation 5V reference Under voltage protection Thermal shutdown at 130°C 2kV ESD protection D SO-14 (Plastic MicroPackage) PIN CONNECTIONS (top view) DESCRIPTION The TSM006 integrated circuits incorporate all circuitry to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM controller, these devices include additional features for higher integration. 1 Rt/Ct 2 Fm 3 Cs 4 Bl 5 Ss 6 Comp 7 Bs Dis 14 Rex 13 Vref Vin Out Pgnd Cslope 12 11 10 9 8 APPLICATION s AC/DC adapter D = Small Outline Package (SO) - also available in Tape & Reel (DT) ORDER CODES Part Number TSM006ID TSM006IDT Temperature Range 0, +105°C Package SO Packaging Tube Tape & Reel Marking TSM006 TSM006 July 2004 Revision 1 1/13 TSM006 1 Block Diagram Block Diagram 14 DIS Disable_Latch Thermal Shutdown Vin Hiccup_Latch Icomp 600µA UVLO Standby Vref Vref 12 Cref Vref_Status BS 7 4 6 BL Burst_Latch 2R Comp 1V R Comp_Cs 28V 3 Cs Comp Clamp = Vss LEB Vref Rt 8 Cslope Slop_Compensation Vin 11 1 Ct Rt/Ct Comp_Osc Idct1 300µA Cs_Latch R S Q !Q Out 10 Rb Fm 2 Cfm Iiss 10µA S !Q 9 Pgnd Vref Frequency mod. 0.5V Comp_Hiccup R Q Start up_Latch 5 Css Soft start Ss Idss1 1µA Idss2 1mA Current source REX 13 Rex PIN DESCRIPTION Name RT/CT FM CS BL SS COMP BS CSLOPE PGND OUT VIN VREF REX DIS SO14 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Type Timing capacitor Analog input Analog input Analog output Timing capacitor Analog input Output input Analog output Power supply Analog output Power supply Analog output Analog input Analog input Function Sets the oscillator frequency and maximum duty cycle Frequency modulation Current sense. Burst level Soft start and hiccup timing, latched disable input. Current comparator for current mode control. Burst mode status Slope compensation Power ground Totem pole output to direct drive a power MOSFET. Supply input voltage. +5V Voltage reference External resistor for internal constant current Latched disable 2/13 Absolute Maximum Ratings 2 Absolute Maximum Ratings Symbol Vin DC Supply Voltage Value -0.3 to self limit 0.1 1 -0.3 to 6.5 6 -0.3 to 8 -0.3 to Vin -0.3 to Vref 500 -40 to 150 150 2 TSM006 Unit V A A V mA V V V mW °C °C kV DC Supply Voltage (Iin