TPS2398DMT7G ON Semiconductor

239x AYW TPS2398, TPS2399 -48 V Hot Swap Controller for Redundant Supply Systems The TPS2398 and TPS2399 integrated circuits are hot swap power managers optimized for use in nominal 48 V systems. They www.onsemi.com incorporate an improved circuit breaker response that provides rapid protection from short circuits, while still enabling plugins to tolerate large transients that can be generated by the sudden switchover to a higher voltage supply. They are designed for supply voltage ranges up to 80 V, and are rated to withstand spikes to 100 V. In conjunction MSOP8 with an external Nchannel FET and sense resistor, they can be used to Z SUFFIX enable live insertion of plugin cards and modules in powered CASE 846AD systems. Both devices provide load current slew rate and peak magnitude limiting, easily programmed by sense resistor value and a single external capacitor. PIN CONNECTIONS AND MARKING DIAGRAM Features Wide Input Supply: 36 V to 80 V 1 PG RTN Transient Rating to 100 V EN GATE Improved Transient Response FLTTIME ISENS nable Input (EN) IRAMP VIN Programmable Current Limit (Top View) Programmable Current Slew Rate 239x = Specific Device Code Fault Timer to Eliminate Nuisance Trips x = 8 or 9 A = Assembly Location OpenDrain Power Good Output (PG) Y = Year MSOP8 Package W = Work Week = PbFree Package These are PbFree Devices (Note: Microdot may be in either location) Typical Applications 48 V Distributed Power Systems Redundant Negative Voltage Supplies ORDERING INFORMATION See detailed ordering and shipping information on page 15 of Central Office Switching Systems this data sheet. DC/DC 48V VIN+ VOUT+ VOUT+ RTN C3 R3 100 V 33 k 100 F C4 EN R2 100 k VIN VOUT VOUT TPS2398/99 1 8 PG RTN Q1 2 7 NTD6414AN EN GATE 3 6 FLTTIME ISENS C1 4 5 IRAMP VIN 47 nF R1 48V 0.02 C2 INA 3.9 nF 48V INB Figure 1. Application Diagram Semiconductor Components Industries, LLC, 2017 1 Publication Order Number: August, 2017 Rev. 0 TPS2398/DTPS2398, TPS2399 48V RTN VOUT+ RTN REG VDDs 8 R3 R1 30 V 100 k Enabled 1.4 V EN PG 2 1 Priority: R Logic GateHi SET S Q C3 RampHi 100 V Fault Logic Enabled R CLR Q 10 uA 0.6 uA Enabled 100 F OL IRAMP 7.5V 4 Slow/Fast GateHi 0.5 V RSE Overcurrent comparator RampHi 4.5 V 99 R OC VOUT Linear current amplifier (LCA) R 40mV Q1 GATE NTD6414 7 Logic Fault EN C1 Enabled 47 nF OC RSE Slow/Fast Fault 50 uA Enabled ISNS 4.0 V 6 SET FLTTIME S Q Fault 3 R CLR Q OL 0.4 uA 4us R1 100mV C2 0.02 3.9 nF Overload comparator 0.5 V VIN 5 TPS2398 Log0 Enabled TPS2399 Log1 48V IN Figure 2. Internal Block Diagram Table 1. PIN FUNCTION DESCRIPTION Pin Number Pin Name Description 2 EN Enable input to turn on/off power to the load 1 PG Opendrain, activelow indication of a load power good condition. 3 FLTTIME Connection for userprogramming of the fault timeout period. 7 GATE Gate drive for external Nchannel FET 4 IRAMP Programming input for setting the inrush current slew rate. 6 ISENS Current sense input. 8 RTN Positive supply input for the TPS2398 and TPS2399. 5 VIN Negative supply input and reference pin for the TPS2398 and TPS2399. www.onsemi.com 2