NKS1000P06S05

NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion 4.5-14V Input 6A Output Point-of-Load Converter Features ● ● ● ● Wide input ranges: 4.5V –14V High efficiency: 91% @3.3V/6A, 12V input Wide output range: 0.59V to 5.5V Second generation DOSA standard SMT packages ● Remote sense, remote enable control, power good signal, output trim, output overcurrent/short-circuit protections, monotonic start-up ● Voltage sequencing ● All components meet UL 94V0 Applications Options ● ● ● ● ● Negative/Positive enable logic ● Output voltage tracking/Sequence Intermediate bus architecture Telecom, datacom, networking equipment Electronic data processing, servers Distributed power architectures Part Numbering System NKS 1 000  06 S   Series Name: Input Voltage: Output Voltage: Enabling Logic: Rated Output Current: Pin Length Options: Electrical Options: NKS 1: 4.5-14V 000: available* (0.59 -5.5V) P: positive N: negative Unit: A 06: 6A S: SMT* 0: None 1: Output tracking Mechanical Options Lead-free, (ROHS-6 Compliant) 5: open-frame *: Standard product has variable output voltage (adjustable between 0.59 – 5.5V). Please contact the factory if fixed output voltage models are needed. www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 1 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Absolute Maximum Ratings Excessive stresses over these absolute maximum ratings can cause permanent damage to the converter. Operation should be limited to the conditions outlined under the Electrical Specification Section. Parameter Input Voltage (continuous) Sequencing Voltage Operating Ambient Temperature (See Thermal Consideration section) Storage Temperature Symbol Min Max Unit Vi VSEQ -0.3 -0.3 15 Vi Vdc Vdc To -40 85* ˚C Tstg -55 125 ˚C * Derating curves provided in this datasheet end at 85ºC ambient temperature. Operation above 85ºC ambient temperature is allowed provided the temperatures of the key components or the baseplate do not exceed the limit stated in the Thermal Considerations section. Electrical Specifications These specifications are valid over the converter’s full range of input voltage, resistive load, and temperature unless noted otherwise. Input Specifications Parameter Input Voltage Input Current Quiescent Input Current (Vin = 12, Vo = 3.3V) Standby Input Current Input Reflected-ripple Current, Peak-to-peak (5 Hz to 20 MHz, 1 μH source impedance) Input Ripple Rejection (120 Hz) Output Specifications Parameter Output Voltage Set Point Tolerance (Vi = 12 V; Io = Io_max; Ta = 25°C) Output Voltage Set Point Tolerance (over all conditions) Output Regulation: Line Regulation (Vi = 4.5V to 14V, Io = 1/2 of load) Load Regulation (Io = Io_min to Io_max, Vi = 12V) Temperature (Ta = -40°C to 85 °C) Output Ripple and Noise Voltage (5 Hz to 20 MHz bandwidth, Vin = 12V) External Load Capacitance Output Current Output Current-limit Trip Point (hiccup mode) Voltage Tracking/Sequencing Slew Rate – Power UP Voltage Tracking/Sequencing Slew Rate – Power down Symbol Min Typical Max Unit Vi Ii_max Ii_Qsnt Ii_stdby 4.5 - 55 1.2 14 6.5 Vdc A mA mA - - 86 - mAp-p 50 - dB - Symbol Min Typical Max Unit - -1.5 - 1.5 % - -2.5 - 2.5 % - - 10 10 5 mV mV mV Peak-to-peak - - 50 RMS Io Io_cli 0 - 20 15 mV 47 6 2 2 mV μF A A V/ms V/ms www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 2 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Output Specifications (continued) Parameter Efficiency (Vi = 12V; Io = Iomax, TA = 25ºC) Symbol Min Typical Max Unit Vo = 0.59V η 74.5 % Vo = 1.2V Vo = 1.8V Vo = 2.5V Vo = 3.3V Vo = 5V η η η η η 83.8 87.0 89.4 91.0 93.5 % % % % % 400 20 mV μs 400 20 mV μs Dynamic Response (Vi = 12V; Ta = 25°C; Load transient 1A/μs) Load step from 50% to 0% of full load: Peak deviation Settling time (to 10% band of Vo deviation) Load step from 0% to 50% of full load Peak deviation Settling time (to 10% band of Vo deviation) General Specifications Parameter Symbol Min Typical Max Unit - - - - - VON/OFF ION/OFF VON/OFF ION/OFF -0.3 3.5 - - 0.6 10 5 1 V μA V mA - - - - - VON/OFF ION/OFF VON/OFF ION/OFF -0.3 3.5 - - 0.6 10 5 1 V μA V mA 140 6 13.6 600 - 110 °C ms 106 -hour kHz %Vonom %Vonom 50 ohm Remote Enable Negative Logic: Logic Low – Module On Logic High – Module Off Logic Low: Logic High: ION/OFF = 10μA VON/OFF = 0.0V ION/OFF = 1mA Leakage Current Remote Enable Positive Logic: Logic High – Module On Logic Low – Module Off Logic Low: Logic High: ION/OFF = 1.0mA VON/OFF = 0.0V ION/OFF = 0.0μA Leakage Current Over-temperature Protection Turn-on Time (Io = full load, Vo within 1% of setpoint) Calculated MTBF (Bellcore TR-332, 40°C, full load) Switching Frequency Power Good Signal (open drain, positive logic) To Fsw Output LOW threshold Output HIGH threshold Pull down resistance of PGOOD pin 90 7 www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 3 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Efficiency (%) Efficiency (%) Characteristic Curves Output Current (A) Output Current (A) Figure 1(b). Efficiency vs. Load Current (25oC, 1.2V output) Efficiency (%) Efficiency (%) Figure 1(a). Efficiency vs. Load Current (25oC, 0.59V output) Output Current (A) Output Current (A) Figure 1(C). Efficiency vs. Load Current (25oC, 1.8V output) Efficiency (%) Efficiency (%) Figure 1(d). Efficiency vs. Load Current (25oC, 2.5V output) Output Current (A) Output Current (A) Figure 1(e). Efficiency vs. Load Current (25oC, 3.3V output) Figure 1(f). Efficiency vs. Load Current (25oC, 5V output) www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 4 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Output Current 2A/div Output Current 2A/div Output voltage 50mV/div Output voltage 50mV/div Leading the Advancement of Power Conversion Time: 50 us/div Figure 2. Transient Load Response . Input voltage 12V, Output voltage 5V, Output current 3A->0A, Slew rate 1A/µs Tracking Input Output Voltage Output Control (5V/div) Voltage (2V/div) Output Voltage (2V/div) Time: 50 us/div Figure 3. Transient Load Response. Input voltage 12V, Output voltage 5V, Output current 0A -> 3A, Slew rate 1A/µs Time: 2 ms/div Input Voltage (V) Figure 5. Start-Up from Enable Vin = 12V, Vo = 5V, Io = 0A Control Vin=12V Vin=14V Time: (1μs/div) Figure 6. Output Ripple Voltage Vo = 5V, Io = 6A Input Voltage 5V/div Output Voltage Ripple (20mV/div) Vin=8V Output Voltage 2V/div Figure 4. Voltage Tracking/Sequencing (with tracking option)Vin = 12V, Vo = 5V, Io = 0A Time: 2 ms/div Figure 7. Start-Up from Application of Input Voltage Vin = 12V, Vo = 5V, Io = 0A www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 5 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Output Current (A) Output Current (A) Leading the Advancement of Power Conversion Ambient Temperature(ºC) Ambient Temperature(ºC) Figure 8(b). Current Derating Curve for 1.2V Output Vin = 12V, open frame Output Current (A) Output Current (A) Figure 8(a). Current Derating Curve for 0.59V Vin = 12V, open frame Output Ambient Temperature(ºC) Ambient Temperature(ºC) Figure 8(d). Current Derating Curve for 2.5V Output Vin = 12V, open frame Output Current (A) Output Current (A) Figure 8(c). Current Derating Curve for 1.8V Output Vin = 12V, open frame Ambient Temperature(ºC) Figure 8(e). Current Derating Curve for 3.3V Output Vin = 12V, open frame Ambient Temperature(ºC) Figure 8(f). Current Derating Curve for 5V Output Vin = 12V, open frame www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 6 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Feature Descriptions Remote ON/OFF TTL/CMOS ON/OFF The converter can be turned on and off by changing the voltage or resistance between the ON/OFF pin and GND. The NKS converters can be ordered with positive logic or negative enabling logic. For the negative control logic, the converter is ON when the ON/OFF pin is at a logic low level, and OFF when the ON/OFF pin is at a logic high level. For the positive control logic, the converter is ON when the ON/OFF pin is at a logic high level and OFF when the ON/OFF pin is at a logic low level. The converter is ON no matter what control logic is when the ON/OFF pin is left open (unconnected). GND) Figure 10. Direct Logic Drive Remote SENSE The remote SENSE pin is used to sense voltage at the load point to accurately regulate the load voltage and eliminate the impact of the voltage drop in the power distribution path. Figure 9 is the recommended ON/Off control circuit for both positive logic modules and negative logic modules. Recommended value of the pull up resistor R_pull-up is 20K. The maximum allowable leakage current from this pin at logic-high level is listed in the General Specifications table. The SENSE pin should be connected to the point where regulation is desired. The voltage difference between the output pins must not exceed the operating range of this converter shown in the specification table. The logic-low level is from -0.3V to 0.6V, and the maximum switch current during logic low is 10μA. The external switch must be capable of maintaining a logic-low level while sinking this current. When remote sense is not used, the SENSE pin can be connected to the positive output terminals. If the SENSE pins are left floating, the converter will deliver an output voltage slightly higher than its specified typical output voltage. Figure10 shows direct logic control. When this method is used, it’s important to make sure that the voltage at the ON/OFF pin is less than 0.6V in logic LOW state, and is not lower than 3.5V in logic HIGH state. Vin There is no SENSE- pin, the voltage drop on the ground (common) connection is not compensated by the converter, and it is important to make sure that the connection resistance and voltage drop between GND pin and the load is small. Output Voltage Programming and Adjustment R pull_up ON/OFF GND Figure 9. Circuit for Logic Control This series of converters is available with variable output. The converters are preset to a nominal 0.59V output voltage, and can be trimmed up to 5.5V using an external trim resistor. With a trim resistor, the output voltage can only be adjusted higher than the nominal output voltage. The trim pin allows the user to adjust the output voltage set point with an external resistor or voltage. To increase the output voltage, a resistor should be connected between the TRIM pin and the GND pin. The output voltage can be adjusted down by changing the value of the external resistor using the equation below: www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 7 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Rtrim  5.91 (k) Vo  0.591 Where Vo is the desired output voltage. When the remote sense and the trim functions are used simultaneously, do not allow the output voltage at the converter output terminals to be outside the operating range. Input Voltage(V) 16 Output Over-Current Protection 14 12 Upper Limit 10 Lower Limit 8 6 4 2 As a standard feature, the converter turns off when the load current exceeds the current limit. If the over-current or short circuit condition persists, the converter will operate in a hiccup mode (repeatedly trying to restart) until the over-current condition is cleared. 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 Thermal Shutdown Output Voltage(V) As a standard feature, the converter will shut down if an over-temperature condition is detected. Figure 11. Output Voltage vs. Input Voltage set point area Certain restrictions apply on the output voltage set point depending on the input voltage. These are shown in Figure 11. The Upper Limit curve shows that for output voltages below 0.9V, the input voltage must be lower than the maximum of 14V for the converter to operate properly. The Lower Limit curve shows that for output voltages greater than 3.8V, the input voltage needs to be larger than 4.5V. Vin Vo SEQ The thermal shutdown function is designed to turn the converter off when the temperature at the controller reaches 140°C. The converter will resume operation after the converter cools down. Voltage Tracking/Sequencing An optional voltage tracking/sequencing feature is available with these converters. This feature is compatible with DOSA’s “Voltage Sequencing” feature and POLA’s “Voltage Tracking” feature. If this feature is not used, the corresponding SEQ pin should be left open, or tied to a voltage higher than the output voltage but not higher than the input voltage. TRIM SENSE Rtrim ON/OFF GND GND Figure 12. Circuit to Trim Output Voltage. The circuit configuration for trim operation is shown in Figure 12. Because NKS converters use GND as the reference for control, Rtrim should be placed as close to the GND pin as possible, and the trace connecting the GND pin and Rtrim resistor should not carry significant current, to reduce the effect of voltage drop on the GND trace/plain on the output voltage accuracy. This feature forces the output of the converter to follow the voltage at the SEQ pin until it reaches the set-point during startup, or is completely shutdown during turnoff. The converter’s output voltage is controlled to be the same magnitude as the voltage on the SEQ pin, on a 1:1 basis. When using this function, one should pay careful attention to the following aspects: 1) This feature is intended mainly for startup and shutdown sequencing control. In normal operation, the voltage at SEQ pin should be maintained higher than the required output voltage or left unconnected; 2) The input voltage should be valid for this feature to work. During startup, it is recommended to have a delay of at least 10 ms between the www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 8 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion establishment of a valid input voltage and the application of a voltage at the SEQ pin; 3) The ON/OFF pin should be in “Enabled” state when this function is effective. Design Considerations Input Source Impedance and Filtering The stability of the NKS converters, as with any DC/DC converter, may be compromised if the source impedance is too high or too inductive. It’s desirable to keep the input source AC impedance as low as possible. To reduce ripple current getting into the input circuit (especially the ground/return conductor), it is desirable to place some low ESR capacitors at the input. Due to the existence of some inductance (such as the trace inductance, connector inductance, etc) in the input circuit, possible oscillation may occur at the input of the converter. We recommend using a combination of ceramic capacitors and Tantalum/Polymer capacitors at the input so that the relatively higher ERS of Tantalum/Polymer capacitors can help damp the possible oscillation between the ceramic capacitors and the inductance. Thermal derating curves are highly influenced by test conditions and the test setup, such as the interface method between the converter and the test fixture board, spacing and construction (especially copper weight, holes and openings) of the fixture board and the spacing board, temperature measurement method, and the ambient temperature measurement point. The thermal derating curves in this datasheet are obtained by thermal tests in a wind tunnel at 25ºC, 55ºC, 70ºC, and 85ºC. The converter’s power pins are soldered to a 2-layer test fixture board. The space between the test board and a PWB spacing board is 1”. Convection heat transfer is the primary cooling means for these converters. Therefore, airflow speed is important for any intended operating environment. Increasing the airflow over the converter enhances the heat transfer via convection. Figures 10 (a) through (f) show the current derating curves under nominal input voltage for a few output voltages. To maintain high long-term reliability, the module should be operated within these curves in steady state. Note: the Natural convection condition can be measured from 0.05 - 0.15 m/s ( 10 - 30 LFM). Similarly, although the converter is designed to be stable without external capacitor at the output, some low ESR capacitors at the output may be desirable to further reduce the output voltage ripple or improve the transient response. A combination of ceramic capacitors and Tantalum/Polymer capacitors usually achieves good results. Thermal Considerations The NKS converters can operate in various thermal environments. Due to high efficiencies and optimal heat distribution, these converters exhibit excellent thermal performance. The maximum allowable output power of any power converter is usually determined by the electrical design and the maximum operating temperature of its components. The NKS converters have been tested comprehensively under various conditions to generate the derating curves with consideration for long term reliability. www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 9 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Mechanical drawing Notes: 1) All dimensions in mm (inch) (1 inch = 25.4mm). Tolerances: .x (.xx): + 0.5 (0.020’’) .xxx: + 0.25 (0.010’’) 2) Workmanship: Meet or exceeds IPC-A-610 Class II www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 10 NKS1000x06Sxx 4.5-14V Input, 0.59-5.5V, 6A Output Leading the Advancement of Power Conversion Recommended Pad Layout www.netpowercorp.com Datasheet NKS1000x06Sxx 07-06-2016 11