26V, 4-Channel Voltage Bus and 4-Channel High-Side Current Shunt Monitor NCP45492 The NCP45492 is a highperformance monolithic IC which can be used to monitor bus voltage and current on four highvoltage power www.onsemi.com supplies simultaneously. The HV bus voltages and currents are translated to a lowvoltage power domain and multiplexed onto a single differential output for measurement externally by common ADCs. The device is configurable to operate either standalone or as a 1 pair, permitting up to eight separate HV power supplies to be QFN32 4x4 monitored and measured. CASE 485CD Features MARKING DIAGRAM Translates and Scales Shunt and Bus Voltages up to 26 V Single Device Monitors Four Supplies 45492 ALYW May Be Paired for Monitoring Up To Eight Supplies CCCCC Very Low Powerdown Current All Channels Individually Gain Programmable by External Resistor 45492 = Specific Device Code Selection A = Assembly Location L = Wafer Lot Fast Settling Time Y = Year RealTime Indication of All Bus Voltages Valid W = Work Week Adjustable Output CommonMode Voltage Adapts to Most External = PbFree Package CCCCC= Country of Assembly ADCs LeadFree Device PIN CONFIGURATION Applications Computers/Notebooks Graphical Cards Power Management/Power Control Loops SH IN N1 1 24 BS REF Battery Chargers SH IN P1 2 BG REF OUT 23 BS IN1 3 CM REF IN 22 R VBUS SHUNT to load SH IN N2 4 21 NC 33: GND SH IN P2 5 20 DIFF OUT P R3 R1 SH IN P1 SH IN N1 6 19 DIFF OUT N BS IN2 SH O2 7 18 NC Channel 1(of4) BS IN1 NC 8 17 SH O4 MUX SEL Sequence R 4 Logic MODE SEL SH O1 from Channel 2 DIFF OUT P R 2 Single-ended Multiplexer from Channel 3 to Diff Amp DIFF OUT N (Top View) from Channel 4 GND FET ORDERING INFORMATION ENABLE BS OK Device Package Shipping SKIP V REF NCP45492XMNTWG QFN32 4000 / Generator (PbFree) Tape & Reel BS REF CM REF IN BG REF OUT For information on tape and reel specifications, R5 R6 including part orientation and tape sizes, please R7 R8 refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Figure 1. Block Diagram Semiconductor Components Industries, LLC, 2019 1 Publication Order Number: June, 2020 Rev. 1 NCP45492/D GND FET SH O3 BS IN3 SH IN P3 SH IN N3 BS IN4 SH IN P4 SH IN N4NCP45492 Table 1. PIN DESCRIPTION Pin Name I/O Function 2, 5, 12, 15 SH IN Px AI Shunt Resistor Sense +, High Voltage 1, 4, 13, 16 SH IN Nx AI Shunt Resistor Sense , High Voltage 32, 7, 10, 17 SH Ox AO Shunt Voltage Gain Set / Filter, Current Output 3, 6, 11, 14 BS INx AI Bus Voltage Sense, High Impedance Input 20 DIFF OUT P AO Differential Output, Positive 19 DIFF OUT N AO Differential Output, Negative 22 CM REF IN AI CommonMode Reference for Differential Output 29 MUX SEL DI Multiplexer Select Input 24 BS REF AI Bus OK Reference Input 30 BS OK DO Bus OK output (opendrain high impedance = BUS OK) 28 ENABLE DI Device Enable. When high, places device in lowpower state 23 BG REF OUT AO Buffered Bandgap Voltage Output 9 GND FET AO Lowside GND ref for resistor dividers (open drain type) 25 SKIP DI Skip Function control (see description) 26 MODE SEL AI Multilevel Input for singledevice, device A, or device B modes 8, 18, 21,31 NC Pins must be floated 27 VCC PWR Device Power PAD GND GND Device Ground Table 2. MAXIMUM RATINGS Rating Pins Condition Symbol Value Unit Supply Voltage Range V GND = 0 V V 0.3 to 5.5 V CC CC Shunt Input Voltage Range SH IN Px, SH IN Nx GND = 0 V V 0.3 to 30 V SH IN X Bus Input Voltage Range BS INx GND = 0 V V 0.3 to 30 V BS IN Grounding FET Range GND FET GND = 0 V V 0.3 to 30 V GND FET Shunt Output Voltage Range SH Ox GND = 0 V V 0.3 to 5.5 V SH Ox Digital Input Voltage Range MUX SEL, ENABLE, SKIP, GND = 0 V V 0.3 to 5.5 V EN MODE SEL Low Voltage I/O Range BS REF, CM REF IN, GND = 0 V V 0.3 to 5.5 V LV MODE SEL, DIFF OUT P, DIFF OUT N, BS OK, BG REF OUT Thermal Resistance, JunctiontoAir R 40 C/W JA Thermal Resistance, JunctiontoCase R 5 C/W JC (V Paddle) IN Operating Temperature Range T 40 to 105 C A1 Functional Temperature Range T 40 to 125 C A2 Maximum Junction Temperature T 125 C J Storage Temperature Range T 40 to 150 C STG Lead Temperature, Soldering (10 sec.) T 260 C SLD Moisture Sensitivity Level MSL 1 Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. www.onsemi.com 2