DEMO MANUAL DC2315A LTC4235-1/LTC4235-2 Dual 12V Ideal Diode-OR and Single Hot Swap Controller with Current Monitor DESCRIPTION Demonstration circuit 2315A is intended to demonstrate The main board components are the LTC4235 controller, the performance of the LTC 4235-1/LTC4235-2 Dual 12V two power MOSFETs functioning as ideal diodes and one Ideal Diode-OR and Single Hot Swap Controller with power MOSFET controlled as a Hot Swap switch, two Current Monitor. The controller operates in redundant jumpers for enabling the second ideal diode (DIODE2 OFF) 12V supply circuits, where each rail has an individual and Hot Swap (ON SEL), two LEDs to indicate power good ideal diode, and the outputs are connected to the load (PWRGD) and fault (FAULT) conditions, seven banana through a single Hot Swap circuit. The controller enables jacks for connecting power supplies and load, and many monitoring of the load current by providing a signal that turrets and pads for observing circuit signals. is 100 the sense resistor voltage. Table 1. DC2315A Assembly Options VERSION PART OVERCURRENT FAULT The DC2315A allows verification of the LTC4235 Hot Swap DC2315A-A LTC4235-1 LATCHOFF and ideal diode functionality during individual rail ramp-up DC2315A-B LTC4235-2 RETRY and ramp-down events, during power supply switchover, in steady state, and in overcurrent fault conditions. Design files for this circuit board are available at DEMO MANUAL DC2315A PERFORMANCE SUMMARY SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Hot Swap Diode Control V Current Limit Sense Voltage Threshold OUT = 11V 22.5 25 27.5 mV SENSE(TH) (V +V ) OUT = 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 ) I = 0, 1A 10 12 14 V HGATE HGATE OUT V External N-Channel 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, H = 0V 7 10 13 A HGATE(UP) GATE I External N-Channel Gate Pull-Down Current Gate Drive Off, OUT = 12V, 1 2 4 mA HGATE(DN) H =OUT+5V GATE I External N-Channel Gate Fast Pull-Down Current Fast Turn-Off, OUT = 12V, 100 200 350 mA HGATE(FPD) H =OUT+ 5V GATE V OUT Power Good Threshold OUT Rising 10.2 10.5 10.8 V OUT(PGTH) Input/Output Pin V ON Pin Threshold Voltage ON Rising 1.21 1.235 1.26 V ON(TH) V ON Pin Fault Reset Threshold Voltage ON Falling 0.57 0.6 0.63 V ON(RESET) V D2OFF Pin High Threshold Voltage D2OFF Rising 1.21 1.235 1.26 V D2OFF(H,TH) V D2OFF Pin Low Threshold Voltage D2OFF Pin Failing 1.19 1.215 1.24 D2OFF(L,TH) V FTMR Pin High Threshold Voltage 1.198 1.235 1.272 V FTMR(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) D Auto-Retry Duty Cycle 0.07 0.15 0.23 % RETRY Current Monitor V Floating Regulator Voltage (V + V ) I = 1A 3.6 4.1 4.6 V REG SENSE SENSE REG V IMON Input Offset Voltage V = 0V 150 V IMON(OS) SENSE G IMON Voltage Gain V = 20mV and 5mV 99 100 101 V/V IMON SENSE V IMON Minimum Output Voltage V = 200V 40 mV IMON(MIN) SENSE R IMON Output Resistance V = 200V 15 20 27 k IMON(OUT) SENSE dc2315af 2