DEMO MANUAL DC2314A LTC4236-1/LTC4236-2 Dual Ideal Diode-OR and Single Hot Swap Controller with Current Monitor DESCRIPTION Demonstration circuit 2314A is intended to demonstrate The main board components are the LTC4236 controller, the performance of the LTC4236-1/LTC4236-2 Dual Ideal two power MOSFETs functioning as ideal diodes and one Diode-OR and Single Hot Swap Controller with Current power MOSFET controlled as a Hot Swap switch, two jump- Monitor. The controller operates in redundant supply ers for enabling the second ideal diode and Hot Swap, four circuits, where each rail has an individual ideal diode, and LEDs to indicate the power good state, fault condition, and the outputs are connected to the load through a single the state of the MOSFETs operating as ideal diodes, seven Hot Swap circuit. The controller enables monitoring of banana jacks for connecting power supplies and loads, the load current by providing a signal that is 100 the and many turrets and pads for observing circuit signals. sense resistor voltage. Table 1. DC2314A Assembly Options The DC2314A allows verification of the LTC4236 Hot Swap Version Part Overcurrent Fault and ideal diode functionality during individual rail ramp-up DC2314A-A LTC4236-1 LATCHOFF and ramp-down events, during power supply switchover, DC2314A-B LTC4236-2 RETRY in steady state, and in overcurrent fault conditions. Design files for this circuit board are available at The DC2314A is configured for 12V operation with a 10A DEMO MANUAL DC2314A BOARD AND CONTROLLER PERFORMANCE SUMMARY Specifications are at T = 25C A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Hot Swap Diode Control V Current Limit Sense Voltage Threshold FB = 1.3V 22.5 25 27.5 mV SENSE(TH) + (V V ) FB = 0V 5.8 8.3 10.8 mV SENSE SENSE + + V SENSE Undervoltage Lockout SENSE Rising 1.8 1.9 2 V SENSE+(UVL) + V SENSE Undervoltage Lockout Hysteresis 10 50 90 mV SENSE+(HYS) V External N-Channel Gate Drive (V V ) IN < 7V, I = 0, 1A 5 7 14 V HGATE HGATE OUT IN = 7V to 18V, I = 0, 1A 10 12 14 V V Gate High Threshold (V V ) 3.6 4.2 4.8 V HGATE(H) HGATE OUT I External N-Channel Gate Pull-Up Current Gate Drive On, HGATE = 0V 7 10 13 A HGATE(UP) I External N-Channel Gate Pull-Down Current Gate Drive Off, OUT = 12V, HGATE = OUT +5V 1 2 4 mA HGATE(DN) I External N-Channel Gate Fast Pull-Down Current Fast Turn-Off, OUT = 12V, HGATE = OUT +5V 100 200 350 mA HGATE(FPD) Input/Output Pin V ON, FB Pin Threshold Voltage Voltage Rising 1.21 1.235 1.26 V IN(TH) V ON Pin Fault Reset Threshold Voltage ON Falling 0.57 0.6 0.63 V ON(RESET) V D2OFF Pin High Threshold D2OFF Rising 1.21 1.235 1.26 V D2OFF(H,TH) V FTMR, DTMR Pin High Threshold 1.198 1.235 1.272 V TMR(H) I FTMR Pull-Up Current FTMR = 1V, in Fault Mode 80 100 120 A FTMR(UP) I FTMR Pull-Down Current FTMR = 2V, No Faults 1.3 2 2.7 A FTMR(DN) Current Monitor G IMON Voltage Gain V = 20mV and 5mV 99 100 101 V/V IMON SENSE + V IMON Maximum Output Voltage V = 70mV, 5V SENSE 18V 3.5 5.5 V IMON(MAX) SENSE + V = 35mV, SENSE = 2.9V 2.7 2.9 V SENSE R IMON Output Resistance V = 200V 15 20 27 k IMON(OUT) SENSE dc2314af 2