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TPS61046YFFR

TPS61046YFFR

  • 厂商:

    BURR-BROWN(德州仪器)

  • 封装:

    DSBGA6_1.22X0.82MM

  • 描述:

    采用 WCSP 封装的 28V 输出电压升压转换器

  • 数据手册
  • 价格&库存
TPS61046YFFR 数据手册
Product Folder Sample & Buy Support & Community Tools & Software Technical Documents TPS61046 SLVSCQ7 – APRIL 2015 TPS61046 28-V Output Voltage Boost Converter in WCSP Package 1 Features 3 Description • The TPS61046 is a highly integrated boost converter designed for applications requiring high voltage and tiny solution size such as PMOLED panel and sensor module. The TPS61046 integrates a 30-V power switch, input/output isolation switch, and power diode. It can output up to 28 V from input of a Li+ battery or two cell alkaline batteries in series. 1 • • • • • • • • • • • • • Input Voltage Range: 1.8 V to 5.5 V, 1.6 V after Startup Output Voltage Up to 28 V Integrated Power Diode and Isolation Switch 900-mA (typical) Switch Current Up to 85% Efficiency at 3.6-V Input and 12-V Output 500-nA Ultra-low Shutdown Current ±2% Output Voltage Accuracy Power Save Operation Mode at Light Load Internal 10-ms Soft Start Time True Disconnection between Input and Output during Shutdown Output Short Circuit Protection Output Over-Voltage Protection Thermal Shutdown Protection 0.80-mm × 1.20-mm WCSP package The TPS61046 operates with a switching frequency at 1.0 MHz. This allows the use of small external components. The TPS61046 has an internal default 12-V output voltage setting by connecting the FB pin to the VIN pin. Thus it only needs three external components to get 12-V output voltage. Together with WCSP package, the TPS61046 gives a very small overall solution size. The TPS61046 has typical 900mA switch current limit. It has 10-ms built-in soft start time to minimize the inrush current. When the TPS61046 is in shutdown mode, the isolation switch disconnects the output from input to minimize the leakage current. The TPS61064 also implements output short circuit protection, output over-voltage protection and thermal shutdown. 2 Applications • • • • The TPS61046 is available in a 6-pin 0.80-mm x 1.20-mm WCSP package. PMOLED Power Supply Wearable Devices Portable Medical Equipment Sensor Power Supply Device Information(1) PART NUMBER TPS61046 PACKAGE WCSP (6) BODY SIZE (NOM) 0.80 mm x 1.20 mm (1) For all available packages, see the orderable addendum at the end of the datasheet. 4 Simplified Schematic L1 1.8 V ~ 5.5 V C1 10PH 1.0PF VIN SW 4.5 V ~ 28 V GND VOUT C2 TPS61046 ON OFF EN R1 2.2PF FB R2 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com Table of Contents 1 2 3 4 5 6 7 8 Features .................................................................. Applications ........................................................... Description ............................................................. Simplified Schematic............................................. Revision History..................................................... Pin Configuration and Functions ......................... Specifications......................................................... 1 1 1 1 2 3 4 7.1 7.2 7.3 7.4 7.5 7.6 4 4 4 4 5 6 Absolute Maximum Ratings ...................................... ESD Ratings ............................................................ Recommended Operating Conditions....................... Thermal Information .................................................. Electrical Characteristics........................................... Typical Characteristics .............................................. 8.3 Feature Description................................................... 9 9 Application and Implementation ........................ 11 9.1 Application Information............................................ 11 9.2 Typical Application - 12-V Output Boost Converter 11 9.3 System Examples ................................................... 15 10 Power Supply Recommendations ..................... 16 11 Layout................................................................... 17 11.1 Layout Guidelines ................................................. 17 11.2 Layout Example .................................................... 17 12 Device and Documentation Support ................. 18 12.1 12.2 12.3 12.4 12.5 Detailed Description .............................................. 8 8.1 Overview ................................................................... 8 8.2 Functional Block Diagram ......................................... 8 Device Support .................................................... Community Resources.......................................... Trademarks ........................................................... Electrostatic Discharge Caution ............................ Glossary ................................................................ 18 18 18 18 18 13 Mechanical, Packaging, and Orderable Information ........................................................... 19 5 Revision History 2 DATE REVISION NOTES April 2015 * Initial release. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 6 Pin Configuration and Functions YFF Package 6-Ball WCSP (Top View) VIN GND FB SW EN VOUT Pin Functions PIN NAME NUMBER I/O DESCRIPTION EN C1 I Enable logic input. Logic high voltage enables the device. Logic low voltage disables the device and turns it into shutdown mode. FB B1 I Voltage feedback of adjustable output voltage. Connect to the center tap of a resistor divider to program the output voltage. When it is connected to the VIN pin, the output voltage is set to 12 V by an internal feedback. GND A2 PWR Ground SW B2 PWR The switch pin of the converter. It is connected to the drain of the internal power MOSFET. VIN A1 I VOUT C2 PWR IC power supply input Output of the boost converter Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 3 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 7 Specifications 7.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) Voltage range at terminals (2) (1) MIN MAX UNIT VIN, EN, FB – 0.3 6 V SW, VOUT –0.3 32 V Operating junction temperature range, TJ –40 150 °C Storage temperature range, Tstg –65 150 °C (1) (2) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to network ground terminal. 7.2 ESD Ratings Human body model (HBM), per ANSI/ESDA/JEDEC JS-001, all pins V(ESD) (1) (2) (3) (1) Electrostatic discharge (2) Charged device model (CDM), per JEDEC specification JESD22-C101, all pins (3) VALUE UNIT ±2000 V ±500 V Electrostatic discharge (ESD) to measure device sensitivity and immunity to damage caused by assembly line electrostatic discharges in to the device. JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 7.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) MIN TYP MAX UNIT VIN Input voltage range 1.8 5.5 V VOUT Output voltage range 4.5 28 V L Effective inductance range 1.0×0.7 10 CIN Effective input capacitance range 0.22 1.0 COUT Effective output capacitance range 0.22 1.0 TJ Operating junction temperature –40 22×1.3 µH µF 10 µF 125 °C 7.4 Thermal Information TPS61046 THERMAL METRIC (1) YFF (WCSP) UNIT 6 BALLS RθJA Junction-to-ambient thermal resistance RθJC(top) Junction-to-case (top) thermal resistance 1.6 RθJB Junction-to-board thermal resistance 22.3 ψJT Junction-to-top characterization parameter 5.6 ψJB Junction-to-board characterization parameter 22.3 RθJC(bot) Junction-to-case (bottom) thermal resistance n/a (1) 4 135.4 °C/W For more information about traditional and new thermal metrics, see the IC Package Thermal Metrics application report, SPRA953. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 7.5 Electrical Characteristics TJ = –40°C to 125°C, VIN = 3.6 V and VOUT = 12 V. Typical values are at TJ = 25°C, unless otherwise noted. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWER SUPPLY VIN Input voltage range VIN_UVLO Under voltage lockout threshold VIN_HYS VIN UVLO hysteresis IQ_VIN Quiescent current into VIN pin ISD Shutdown current into VIN pin 1.8 5.5 VIN rising 1.75 1.8 VIN falling 1.55 1.6 200 V V mV IC enabled, no load, no switching, VIN = 1.8 V to 5.5 V, VOUT = 12 V 110 200 µA IC disabled, VIN = 1.8 V to 5.5 V, TJ up to 85°C 0.1 0.8 µA 0.5 µA 28 V IC disabled, VIN = 1.8 V to 5.5 V, TJ up to 60°C OUTPUT VOUT Output voltage range VOUT_12V 12-V output voltage accuracy VREF Feedback voltage VOVP Output overvoltage protection threshold VOVP_HYS Over voltage protection hysteresis IFB_LKG Leakage current into FB pin ISW_LKG Leakage current into SW pin 4.5 FB pin connected to VIN pin, TJ=0°C to 125°C PWM mode, TJ=0°C to 125°C 11.7 12 12.3 V 0.779 0.795 0.811 V PFM mode, TJ=0°C to 125°C 0.803 28 29.2 V 30.4 V 200 nA 500 nA 0.8 IC disabled, TJ up to 85°C V POWER SWITCH Isolation MOSFET on resistance VOUT = 12 V 850 Low-side MOSFET on resistance VOUT = 12 V 450 fSW Switching frequency VIN = 3.6 V, VOUT = 12 V, PWM mode tON_min Minimal switch on time ILIM_SW Peak switch current limit VIN = 3.6 V, VOUT = 12 V ILIM_CHG Pre-charge current VIN = 3.6 V, VOUT = 0 V tSTARTUP Startup time VOUT from VIN to 12 V, COUT_effective = 2.2 µF, IOUT = 0 A RDS(on) 850 600 2 mΩ 1050 1250 150 250 ns 900 1200 mA 30 50 mA 5 kHz ms LOGIC INTERFACE VEN_H EN Logic high threshold VEN_L EN Logic Low threshold 1 0.4 V V PROTECTION TSD Thermal shutdown threshold TJ rising TSD_HYS Thermal shutdown hysteresis TJ falling below TSD 150 °C 20 °C Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 5 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 7.6 Typical Characteristics 100 100 90 90 80 80 70 70 Efficiency (%) Efficiency (%) VIN = 3.6 V, VOUT = 12 V, TJ = –40°C to 125°C, unless otherwise noted. 60 50 40 30 60 50 40 30 VIN = 1.8 V VIN = 3.0 V VIN = 3.6 V VIN = 4.2 V 20 10 0 0.0001 0.001 0.01 Output Current (A) 0.1 20 VOUT = 5 V VOUT = 12 V VOUT = 24 V 10 0 0.0001 1 0.001 D001 VIN = 1.8 V, 3.0 V, 3.6 V, 4.2 V, VOUT = 12 V 12.3 805 12.2 12.1 12 11.9 800 795 790 -20 0 20 40 60 Temperature (°C) 80 100 780 -40 120 -20 0 20 40 60 Temperature (°C) D001 80 100 120 D001 VIN = 3.6 V, VOUT = 12 V Figure 3. 12-V Fixed Output Voltage vs Temperature Figure 4. Reference Voltage vs Temperature 150 150 140 140 130 130 Quiescent Current (PA) Quiescent Current (PA) D001 785 11.8 VIN = 3.6 V, VOUT = 12 V, FB pin connected to VIN pin 120 110 100 90 80 120 110 100 90 80 -20 0 20 40 60 Temperature(°C) 80 100 120 70 1.8 2.4 D001 VIN = 3.6 V, VOUT = 12 V, No switching 3 3.6 4.2 Input Voltage (V) 4.8 5.4 6 D001 VIN = 1.8 V ~ 6 V, VOUT = 12 V, No switching Figure 5. Quiescent Current vs Temperature 6 1 Figure 2. Efficiency vs Output Current 810 Reference Voltage (mV) 12-V Fixed Output Voltage (V) Figure 1. Efficiency vs Output Current 70 -40 0.1 VIN = 3.6 V, VOUT = 5 V, 12 V, 24 V 12.4 11.7 -40 0.01 Output Current (A) Figure 6. Quiescent Current vs Input Voltage Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 Typical Characteristics (continued) VIN = 3.6 V, VOUT = 12 V, TJ = –40°C to 125°C, unless otherwise noted. 0.4 1100 1000 0.3 Current Limit (mA) Shutdown Current (PA) 0.35 0.25 0.2 0.15 900 800 700 0.1 600 0.05 0 -40 -20 0 20 40 Temperature (°C) 60 500 -40 80 -20 0 20 40 60 Temperature (°C) D001 VIN = 3.6 V 80 100 120 D001 VIN = 3.6 V, VOUT = 12 V Figure 7. Shutdown Current vs Temperature Figure 8. Current Limit vs Temperature 1100 Current Limit (mA) 1000 900 800 700 600 500 1.8 2.4 3 3.6 4.2 Input Voltage (V) 4.8 5.4 6 D001 VIN = 1.8 V ~ 6 V, VOUT = 12 V Figure 9. Current Limit vs Temperature Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 7 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 8 Detailed Description 8.1 Overview The TPS61046 is a highly integrated boost converter designed for applications requiring high voltage and tiny solution size such as PMOLED panel power supply and sensor module. The TPS61046 integrates a 30-V power switch, input/output isolation switch, and power diode. It can output up to 28 V from input of a Li+ battery or two cell alkaline batteries in series. One common issue with conventional boost regulators is the conduction path from input to output even when the power switch is turned off. It creates three problems, which are inrush current during start-up, output leakage current during shutdown and excessive over load current. In the TPS61046, the isolation switch is turned off under shutdown mode and over load conditions, thereby opening the current path. Thus the TPS61046 can truely disconnect the load from the input voltage and minimize the leakage current during shutdown mode. The TPS61046 operates with a switching frequency at 1.0 MHz. This allows the use of small external components. The TPS61046 has an internal default 12-V output voltage setting by connecting the FB pin to the VIN pin. Thus it only needs three external components to get 12-V output voltage. Together with WCSP package, the TPS61046 gives a very small overall solution size. The TPS61046 has typical 900-mA switch current limit. It has 10-ms built-in soft start time to minimize the inrush current. The TPS61064 also implements output short circuit protection, output over-voltage protection and thermal shutdown. 8.2 Functional Block Diagram VIN SW A1 B2 VIN VOUT UVLO C2 VOUT Thermal Shutdown Gate Driver Gate Driver EN C1 Logic Pre-charge & Short Circuit Protection & On/Off Control EN PWM / PFM Control 1.2V FB GND A2 OVP REF VOUT Soft Start & Current Limit Control B1 FB EA REF 8 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 8.3 Feature Description 8.3.1 Under-Voltage Lockout An under-voltage lockout (UVLO) circuit stops the operation of the converter when the input voltage drops below the typical UVLO threshold of 1.55 V. A hysteresis of 200 mV is added so that the device cannot be enabled again until the input voltage goes up to 1.75 V. This function is implemented in order to prevent malfunctioning of the device when the input voltage is between 1.55 V and 1.75 V. 8.3.2 Enable and Disable When the input voltage is above maximal UVLO rising threshold of 1.8 V and the EN pin is pulled high, the TPS61046 is enabled. When the EN pin is pulled low, the TPS61046 goes into shutdown mode. The device stops switching and the isolation switch is turned off providing the isolation between input and output. In shutdown mode, less than 1-µA input current is consumed. 8.3.3 Soft Start The TPS61046 begins soft start when the EN pin is pulled high. at the beginning of the soft start period, the isolation FET is turned on slowly to charge the output capacitor with 30-mA current for about 5 ms. This is called the pre-charge phase. After the pre-charge phase, the TPS61046 starts switching. This is called switching soft start phase. An internal soft start circuit limits the peak inductor current according to the output voltage. When the output voltage is below 3 V, the peak inductor current is limited to 140 mA. Along with the output voltage going up from 3 V to 5 V, the peak current limit is gradually increased to the normal value of 900 mA. The switching soft start phase is about 5 ms typically. The soft start funciton reduces the inrush current during startup. 8.3.4 Over-voltage Protection The TPS61046 has internal output over-voltage protection (OVP) function. When the output voltage exceeds the OVP threshold of 29.2 V, the device stops switching. Once the output voltage falls 0.8 V below the OVP threshold, the device resumes operation again. 8.3.5 Output Short Circuit Protection The TPS61046 starts to limit the output current whenever the output voltage drops below 4 V. The lower output voltage, the smaller output current limit. When the VOUT pin is shorted to ground, the output current is limited to less than 200 mA. This function protects the device from being damaged when the output is shorted to ground. 8.3.6 Thermal Shutdown The TPS61046 goes into thermal shutdown once the junction temperature exceeds 150°C. When the junction temperature drops below the thermal shutdown temperature threshold less the hysteresis, typically 130°C, the device starts operating again. 8.3.7 Device Functional Modes The TPS61046 has two operation modes, PWM mode and power save mode. 8.3.7.1 PWM Mode The TPS61046 uses a quasi-constant 1.0-MHz frequency pulse width modulation (PWM) at moderate to heavy load current. Based on the input voltage to output votlage ratio, a circuit predicts the required off-time. At the beginning of the switching cycle, the NMOS switching FET, shown in the functional block diagram, is turned on. The input voltage is applied across the inductor and the inductor current ramps up. In this phase, the output capacitor is discharged by the load current. When the inductor current hits the current threshold that is set by the output of the error amplifier, the PWM switch is turned off, and the power diode is forward-biased. The inductor transfers its stored energy to replenish the output capacitor and supply the load. When the off-time is expired, the next switching cycle starts again. The error amplifier compares the FB pin voltage with an internal reference votlage, and its output determines the inductor peak current. The TPS61046 has a built-in compensation circuit that can accommodate a wide range of input voltage, output voltage, inductor value and output capacitor value for stable operation. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 9 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com Feature Description (continued) 8.3.8 Power Save Mode The TPS61046 integrates a power save mode with pulse frequency modulation (PFM) to improve efficiency at light load. When the load current decreases, the inductor peak current set by the output of the error amplifier declines to regulate the output voltage. When the inductor peak current hits the low limit of 140 mA, the output voltage will exceed the setting voltage as the load current decreases further. When the FB voltage hits the PFM reference voltage, the TPS61046 goes into the power save mode. In the power save mode, when the FB voltage rises and hits the PFM reference voltage, the device continuous switching for several cycles because of the delay time of the internal comparator. Then it stops switching. The load is supplied by the output capacitor and the output voltage declines. When the FB voltage falls below the PFM reference voltage, after the delay time of the comparator, the device starts switching again to ramp up the output voltage. Output Voltage PFM mode at light load 1.01 x VOUT_NOM VOUT_NOM PWM mode at heavy load Figure 10. Output Voltage in PWM Mode and PFM Mode 10 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 9 Application and Implementation 9.1 Application Information The TPS61046 is a boost DC-DC converter with a PWM switch, a power diode and an input/output isolation switch integrated. The device supports up to 28-V output with the input range from 1.8 V to 5.5 V. The TPS61046 adopts the current-mode control with adaptive constant off-time. The switching frequency is quasi-constant at 1.0 MHz. The isolation switch disconnects the output from the input during shutdown to minimize leakage current. The following design procedure can be used to select component values for the TPS61046. 9.2 Typical Application - 12-V Output Boost Converter spacing L1 2.7 V ~ 4.2 V C1 10PH 1.0PF VIN SW 12 V GND VOUT C2 TPS61046 ON OFF EN FB 4.7PF R1 1.0M R2 71.5k Figure 11. 12-V Boost Converter 9.2.1 Design Requirements Table 1. Design Requirements PARAMETERS VALUES Input Voltage 2.7 V ~ 4.2 V Output Voltage 12 V Output Current 50 mA Output Voltage Ripple ±50mV 9.2.2 Detailed Design Procedure 9.2.2.1 Programming the Output Voltage There are two ways to set the output voltage of the TPS61046. When the FB pin is connected to the input voltage, the output voltage is fixed to 12 V. This function makes the TPS61046 only need three external components to minimize the solution size. The second way is to use an external resistor divider to set the desired output voltage. By selecting the external resistor divider R1 and R2, as shown in Equation 1, the output voltage is programmed to the desired value. When the output voltage is regulated, the typical voltage at the FB pin is VREF of 795 mV. §V · R1 ¨ OUT  1¸ u R2 © VREF ¹ (1) Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 11 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com Where: VOUT is the desired output voltage VREF is the internal reference voltage at the FB pin For best accuracy, R2 should be kept smaller than 80 kΩ to ensure the current flowing through R2 is at least 100 times larger than the FB pin leakage current. Changing R2 towards a lower value increases the immunity against noise injection. Changing the R2 towards a higher value reduces the quiescent current for achieving highest efficiency at low load currents. 9.2.2.2 Inductor Selection Because the selection of the inductor affects steady state operation, transient behavior, and loop stability, the inductor is the most important component in power regulator design. There are three important inductor specifications, inductor value, saturation current, and dc resistance (DCR). The TPS61046 is designed to work with inductor values between 1.0 µH and 22 µH. Follow Equation 2 to Equation 4 to calculate the inductor’s peak current for the application. To calculate the current in the worst case, use the minimum input voltage, maximum output voltage, and maximum load current of the application. To have enough design margin, choose the inductor value with -30% tolerance, and a low power-conversion efficiency for the calculation. In a boost regulator, the inductor dc current can be calculated with Equation 2. VOUT u IOUT IL(DC) VIN u K (2) Where: VOUT = output voltage IOUT = output current VIN = input voltage η = power conversion efficiency, use 80% for most applications The inductor ripple current is calculated with the Equation 3 for an asynchronous boost converter in continuous conduction mode (CCM). VIN u VOUT  0.8V  VIN 'IL(P P) L u fSW u VOUT  0.8V (3) Where: ΔIL(P-P) = inductor ripple current L = inductor value f SW = switching frequency VOUT = output voltage VIN = input voltage Therefore, the inductor peak current is calculated with Equation 4. 'IL P P IL P IL DC  2 (4) Normally, it is advisable to work with an inductor peak-to-peak current of less than 40% of the average inductor current for maximum output current. A smaller ripple from a larger valued inductor reduces the magnetic hysteresis losses in the inductor and EMI. Bit in the same way, load transient response time is increased. Because the TPS61046 is for relatively small output current application, the inductor peak-to-peak current could be as high as 200% of the average current with a small inductor value, which means the TPS61046 always works in DCM mode.Table 2 lists the recommended inductor for the TPS61046. Table 2. Recommended Inductors for the TPS61046 12 PART NUMBER L(µH) DCR MAX (mΩ) SATURATION CURRENT (A) SIZE (LxWxH) VENDOR FDSD0420-H-100M 10 200 2.5 4.2x4.2x2.0 Toko CDRH3D23/HP 10 198 1.02 4.0x4.0x2.5 Sumida Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 Table 2. Recommended Inductors for the TPS61046 (continued) PART NUMBER L(µH) DCR MAX (mΩ) SATURATION CURRENT (A) SIZE (LxWxH) VENDOR 1239AS-H-100M 10 460 1.0 2.5x2.0x1.2 Toko VLS4012-4R7M 4.7 132 1.1 4.0x4.0x1.2 TDK 0420CDMCBDS 22 379 1.6 4.5x4.1x2.0 Sumida 9.2.2.3 Input and Output Capacitor Selection The output capacitor is mainly selected to meet the requirements for output ripple and loop stability. This ripple voltage is related to the capacitor’s capacitance and its equivalent series resistance (ESR). Assuming a ceramic capacitor with zero ESR, the minimum capacitance needed for a given ripple can be calculated by: IOUT u DMAX COUT fSW u VRIPPLE (5) Where: DMAX = maximum switching duty cycle VRIPPLE = peak to peak output voltage ripple The ESR impact on the output ripple must be considered if tantalum or aluminum electrolytic capacitors are used. Care must be taken when evaluating a ceramic capacitor’s derating under dc bias, aging, and ac signal. For example, the dc bias can significantly reduce capacitance. A ceramic capacitor can lose more than 50% of its capacitance at its rated voltage. Therefore, always leave margin on the voltage rating to ensure adequate capacitance at the required output voltage. It is recommended to use the output capacitor with effective capacitance in the range of 0.47 μF to 10 μF. The output capacitor affects the small signal control loop stability of the boost regulator. If the output capacitor is below the range, the boost regulator can potentially become unstable. Increasing the output capacitor makes the output voltage ripple smaller in PWM mode. For input capacitor, a ceramic capacitor with more than 1.0 µF is enough for most applications. Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 13 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 9.2.3 Application Performance Curves SW 10 V/div SW 10 V/div VOUT (AC) 20 mV/div VOUT (AC) 50 mV/div Inductor Current 100 mA/div Inductor Current 100 mA/div VIN = 3.6 V, VOUT = 12 V, IOUT = 50 mA VIN = 3.6 V, VOUT = 12 V, IOUT = 20 mA Figure 12. Switching Waveforms in PWM CCM Mode SW 10 V/div Figure 13. Switching Waveforms in PWM DCM Mode EN 1 V/div VOUT (AC) 50 mV/div VOUT 3 V/div Inductor Current 100 mA/div Inductor Current 100 mA/div VIN = 3.6 V, VOUT = 12 V, IOUT = 50 mA VIN = 3.6 V, VOUT = 12 V, IOUT = 3 mA Figure 15. Soft Startup Figure 14. Switching Waveforms in Power Save Mode EN 1 V/div VOUT (AC) 200 mV/div VOUT 3 V/div Output Current 20 mA/div Inductor Current 100 mA/div VIN = 3.6 V, VOUT = 12 V, IOUT = 50 mA VIN = 3.6 V, VOUT = 12 V Figure 16. Shutdown Waveforms 14 Figure 17. 10-mA to 50-mA Load Transient Response Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 Output Voltage (AC) 50 mV/div VIN (3.3 V offset) 200 mV/div VOUT = 12V, IOUT = 50 mA Figure 18. Input Voltage from 3.3-V to 3.6-V Line Transient Response 9.3 System Examples 9.3.1 Fixed 12-V Output Voltage with Three External Components The TPS61046 can output fixed 12-V voltage by connecting the FB pin to the VIN pin to save the external resistor divider. The Figure 19 shows the application circuit. L1 1.8 V ~ 5.5 V C1 10PH 1.0PF VIN SW 12 V FB VOUT C2 2.2PF TPS61046 ON OFF EN GND Figure 19. Fixed 12-V Output Voltage by Connecting the FB Pin to VIN Pin Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 15 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 10 Power Supply Recommendations The device is designed to operate from an input voltage supply range between 1.8 V to 5.5 V. This input supply must be well regulated. If the input supply is located more than a few inches from the converter, additional bulk capacitance may be required in addition to the ceramic bypass capacitors. A typical choice is an electrolytic or tantalum capacitor with a value of 47 µF. The input power supply’s output current needs to be rated according to the supply voltage, output voltage and output current of the TPS61046. 16 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 11 Layout 11.1 Layout Guidelines As for all switching power supplies, especially those running at high switching frequency and high currents, layout is an important design step. If the layout is not carefully done, the regulator could suffer from instability and noise problems. To maximize efficiency, switch rise and fall time are very fast. To prevent radiation of high frequency noise (for example, EMI), proper layout of the high-frequency switching path is essential. Minimize the length and area of all traces connected to the SW pin, and always use a ground plane under the switching regulator to minimize interplane coupling. The input capacitor needs not only to be close to the VIN pin, but also to the GND pin in order to reduce input supply ripple. The most critical current path for all boost converters is from the switching FET, through the rectifier diode, then the output capacitors, and back to ground of the switching FET. This high current path contains nanosecond rise and fall time and should be kept as short as possible. Therefore, the output capacitor needs not only to be close to the VOUT pin, but also to the GND pin to reduce the overshoot at the SW pin and VOUT pin. 11.2 Layout Example A large ground plane on the bottom layer connects the ground pins of the components on the top layer through vias. GND GND VIN GND SW VOUT VIN FB EN VOUT GND Figure 20. PCB Layout Example Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 17 TPS61046 SLVSCQ7 – APRIL 2015 www.ti.com 12 Device and Documentation Support 12.1 Device Support 12.1.1 Third-Party Products Disclaimer TI'S PUBLICATION OF INFORMATION REGARDING THIRD-PARTY PRODUCTS OR SERVICES DOES NOT CONSTITUTE AN ENDORSEMENT REGARDING THE SUITABILITY OF SUCH PRODUCTS OR SERVICES OR A WARRANTY, REPRESENTATION OR ENDORSEMENT OF SUCH PRODUCTS OR SERVICES, EITHER ALONE OR IN COMBINATION WITH ANY TI PRODUCT OR SERVICE. 12.2 Community Resources The following links connect to TI community resources. Linked contents are provided AS IS by the respective contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of Use. TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help solve problems with fellow engineers. Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and contact information for technical support. 12.3 Trademarks E2E, NanoFree are trademarks of Texas Instruments. All other trademarks are the property of their respective owners. 12.4 Electrostatic Discharge Caution These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 12.5 Glossary SLYZ022 — TI Glossary. This glossary lists and explains terms, acronyms, and definitions. 18 Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 TPS61046 www.ti.com SLVSCQ7 – APRIL 2015 13 Mechanical, Packaging, and Orderable Information The following pages include mechanical, packaging, and orderable information. This information is the most current data available for the designated devices. This data is subject to change without notice and revision of this document. For browser-based versions of this data sheet, refer to the left-hand navigation. Package summary Chip scale package dimensions The TPS61046 is available in a 6-bump chip scale package (YFF, NanoFree™). The package dimensions are given as: D=ca. 1192 ± 30µm E=ca. 792 ± 30µm Submit Documentation Feedback Copyright © 2015, Texas Instruments Incorporated Product Folder Links: TPS61046 19 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) TPS61046YFFR ACTIVE DSBGA YFF 6 3000 RoHS & Green SNAGCU Level-1-260C-UNLIM -40 to 125 SJS TPS61046YFFT ACTIVE DSBGA YFF 6 250 RoHS & Green SNAGCU Level-1-260C-UNLIM -40 to 125 SJS (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
TPS61046YFFR 价格&库存

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TPS61046YFFR
  •  国内价格
  • 1+1.69497

库存:6

TPS61046YFFR
  •  国内价格 香港价格
  • 3000+4.385943000+0.52693
  • 6000+4.285026000+0.51481
  • 9000+4.234499000+0.50874
  • 15000+4.1785015000+0.50201

库存:48997

TPS61046YFFR
  •  国内价格 香港价格
  • 1+9.212021+1.10674
  • 10+6.6447010+0.79830
  • 25+6.0057825+0.72154
  • 100+5.29883100+0.63661
  • 250+4.96207250+0.59615
  • 500+4.75918500+0.57177
  • 1000+4.592211000+0.55171

库存:48997

TPS61046YFFR
    •  国内价格
    • 1+1.94546
    • 25+1.80136
    • 100+1.66793
    • 1000+1.54440
    • 3000+1.43000
    • 6000+1.37280

    库存:5500

    TPS61046YFFR
    •  国内价格
    • 1+3.49220
    • 10+3.22350
    • 100+2.95490
    • 1000+2.68630

    库存:49

    TPS61046YFFR
    •  国内价格 香港价格
    • 1+7.300201+0.87670
    • 10+4.5247010+0.54340
    • 100+3.88330100+0.46640
    • 3000+3.883303000+0.46640
    • 24000+3.8017024000+0.45660

    库存:21543