Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsPMIC - DC/DC voltage regulator Boost, Converter/amplifier, Flyback, SEPIC SON 6

VIN5V

10 Hm

VIN SW

GND

CTRL

COMP

4.7 Fm

10nF

TPS 61170

87.6kW

VOUT 12V/300mA

10kW

4.99kW

4.7 Fm

L1: TOKO#A915_Y-100M

C1:MurataGRM188R61A475K

C2:MurataGRM21BR61E475K

D1:

ONsemiMBR0540T1

*R3,C3:CompensationRCnetwork

TPS61170-Q1

www.ti.com

SLVSAX2 – SEPTEMBER 2011

1.2A High Voltage Boost Converter in 2x2mm

QFN Package

Check for Samples: TPS61170-Q1

FEATURES

DESCRIPTION

• Qualified for Automotive Applications

The TPS61170-Q1 is a monolithic, high-voltage

• 3-V to 18-V Input Voltage Range

switching regulator with integrated 1.2-A, 40-V power

• High Output Voltage: Up to 38 V

MOSFET. It can be configured in several standard

switching-regulator topologies, including boost and

• 1.2-A integrated Switch

SEPIC. The device has a wide input-voltage range to

• 1.2-MHz Fixed Switching Frequency

support applications with input voltage from multi-cell

• 12 V at 300 mA and 24 V at 150 mA from 5-V

batteries or regulated 5-V, 12-V power rails.

Input (Typical)

The TPS61170-Q1 operates at a 1.2-MHz switching

• Up to 93% Efficiency

frequency, allowing the use of low-profile inductors

• On-The-Fly Output Voltage Reprogramming

and low-value ceramic input and output capacitors.

External loop compensation components give the

• Skip-Switching Cycle for Output Regulation at

user flexibility to optimize loop compensation and

Light Load

transient response. The device has built-in protection

• Built-in Soft Start

features, such as pulse-by-pulse overcurrent limit,

• 6-Pin, 2 mm × 2 mm QFN Package

soft start and thermal shutdown.

The reference voltage to which the FB pin regulates

APPLICATIONS

is 1.229V. The reference voltage can be lowered

• 5-V to 12-V and 24-V, 12-V to 24-V Boost using a 1-wire digital interface (Easyscale™ protocol)

through the CTRL pin. Alternatively, a pulse

Converter

width-modulation (PWM) signal can be applied to the

• Buck Boost Regulation Using SEPIC Topology

CTRL pin. The duty cycle of the signal reduces the

feedback reference voltage proportionally.

The TPS61170-Q1 is available in a 6-pin 2 mm × 2

mm QFN package, allowing a compact power-supply

solution.

Figure 1. Typical Application

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (29 pages)

PAGE 1
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com 2 1.2A High Voltage Boost Converter in 2x2mm QFN Package Check for Samples: TPS61170-Q1 FEATURES 1 • • • • • • • • • • • DESCRIPTION Qualified for Automotive Applications 3-V to 18-V Input Voltage Range High Output Voltage: Up to 38 V 1.2-A integrated Switch 1.
PAGE 2
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure.
PAGE 3
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS VIN = 3.6 V, CTRL = VIN, TA = –40°C to 125°C, typical values are at TA = 25°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SUPPLY CURRENT VI Input voltage range, VIN IQ Operating quiescent current into VIN Device PWM switching no load 3.0 ISD Shutdown current CRTL=GND, VIN = 4.2 V UVLO Under-voltage lockout threshold VIN falling Vhys Under-voltage lockout Hysteresis 2.2 18 V 2.
PAGE 4
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) VIN = 3.
PAGE 5
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com FUNCTIONAL BLOCK DIAGRAM C2 D1 R1 1 R2 4 L1 FB SW Band Gap Error Amplifer Vin 6 COMP 2 C1 PWM Control R3 5 CTRL C3 Soft Start-up Ramp Generator + Current Sensor Oscillator GND 3 TYPICAL CHARACTERISTICS TABLE OF GRAPHS Circuit of Figure 1, L = TOKO A915_Y-100M, D1 = ONsemi MBR0540T1, unless otherwise noted. FIGURE Efficiency VIN = 5V; VOUT = 12V,18V,24V,30V Figure 2 Efficiency VIN = 5V, 8.
PAGE 6
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com EFFICIENCY vs OUTPUT CURRENT EFFICIENCY vs OUTPUT CURRENT 100 100 VIN = 5 V VIN = 12 V VOUT = 24 V VOUT = 12 V 90 90 VOUT = 30 V VOUT = 24 V VIN = 5 V 80 Efficiency - % Efficiency - % 80 70 70 60 60 50 50 40 40 0 50 100 150 200 Output Current - mA 250 0 300 50 100 150 200 Output Current - mA 250 Figure 2. Figure 3. OUTPUT VOLTAGE vs INPUT VOLTAGE SWITCH CURRENT LIMIT vs DUTY CYCLE 300 1600 11.
PAGE 7
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com ERROR AMPLIFIER TRANSCONDUCTANCE vs TEMPERATURE 1600 Switch Current Limit - mA 1500 1400 1300 1200 1100 1000 900 800 -40 -20 0 20 40 60 80 Temperature - °C 100 120 140 Error Amplifier Transconductance - mhos SWITCH CURRENT LIMIT vs TEMPERATURE 500 400 300 200 100 0 -40 -20 0 20 40 60 80 Temperature - °C 100 Figure 6. Figure 7. FB VOLTAGE vs EASY SCALE STEP PWM SWITCHING OPERATION 120 140 1.4 SW 5 V/div 1.2 FB Voltage - V 1 0.
PAGE 8
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com SKIP-CYCLE SWITCHING SW 5 V/div VOUT 20 mV/div AC IL 50 mA/div t - 400 ns/div Figure 12.
PAGE 9
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com DETAILED DESCRIPTION OPERATION The TPS61170-Q1 integrates a 40-V low side FET for providing output voltages up to 38 V. The device regulates the output with current mode PWM (pulse width modulation) control. The switching frequency of the PWM is fixed at 1.2MHz (typical). The PWM control circuitry turns on the switch at the beginning of each switching cycle.
PAGE 10
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com FEEDBACK REFERENCE PROGRAM MODE SELECTION The CTRL pin is used for changing the FB pin reference voltage on-the-fly. There are two methods to program the reference voltage, PWM signal and 1 wire interface (EasyScale™). The programming mode is selected each time the device is enabled. The default mode is to use the duty cycle of the PWM signal on the CTRL pin to modulate the reference voltage.
PAGE 11
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com For optimum performance, use the PWM mode in the range of 5kHz to 100kHz. The requirement of minimum frequency comes from the EasyScale detection delay and detection time specification for the mode selection. The device can mistakenly enter 1 wire mode if the PWM signal frequency is less than 5kHz. Because there is an internal fixed ON-time error of 40nS, the FB voltage absolute value will be different than expected when the PWM frequency is above 100kHz.
PAGE 12
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com Table 1. Selectable FB Voltage (continued) FB voltage (mV) D4 D3 D2 D1 D0 10 0.197 0 1 0 1 0 11 0.215 0 1 0 1 1 12 0.234 0 1 1 0 0 13 0.270 0 1 1 0 1 14 0.307 0 1 1 1 0 15 0.344 0 1 1 1 1 16 0.381 1 0 0 0 0 17 0.418 1 0 0 0 1 18 0.455 1 0 0 1 0 19 0.492 1 0 0 1 1 20 0.528 1 0 1 0 0 21 0.565 1 0 1 0 1 22 0.602 1 0 1 1 0 23 0.639 1 0 1 1 1 24 0.
PAGE 13
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com Table 2. EasyScale™ Bit Description (continued) BYTE Data byte BIT NUMBER NAME TRANSMISSION DIRECTION 7 (MSB) RFA 6 A1 0 Address bit 1 5 A0 0 Address bit 0 4 D4 3 D3 2 D2 Data bit 2 1 D1 Data bit 1 0 (LSB) D0 Data bit 0 DESCRIPTION Request for acknowledge. If high, acknowledge is applied by device Data bit 4 IN ACK Data bit 3 Acknowledge condition active 0, this condition will only be applied in case RFA bit is set.
PAGE 14
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com The bit detection is based on a Logic Detection scheme, where the criterion is the relation between tLOW and tHIGH. It can be simplified to: High Bit: tHIGH > tLOW, but with tHIGH at least 2x tLOW, see Figure 16. Low Bit: tHIGH < tLOW, but with tLOW at least 2x tHIGH, see Figure 16. The bit detection starts with a falling edge on the CTRL pin and ends with the next falling edge. Depending on the relation between tHIGH and tLOW, the logic 0 or 1 is detected.
PAGE 15
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com APPLICATION INFORMATION PROGRAM OUTPUT VOLTAGE VOUT R1 TPS61170 FB R2 Figure 17. Program Output Voltage To program the output voltage, select the values of R1 and R2 (See Figure 17) according to Equation 2. æ R1 ö + 1÷ è R2 ø Vout = 1.229 V x ç æ Vout ö - 1÷ è 1.229 V ø R1 = R2 x ç (2) Considering the leakage current through the resistor divider and noise decoupling to FB pin, an optimum value for R2 is around 10k.
PAGE 16
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com SWITCH DUTY CYCLE The maximum switch duty cycle (D) of the TPS61170-Q1 is 90% (min). The duty cycle of a boost converter under continuous conduction mode (CCM) is given by: D + Vout * Vin Vout (5) For a 5V to 12V application, the duty cycle is 58.3%, and for a 5V to 24V application, the duty cycle is 79.2%. The duty cycle must be lower than the maximum specification of 90% in the application; otherwise, the output voltage can not be regulated.
PAGE 17
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com SCHOTTKY DIODE SELECTION The high switching frequency of the TPS61170-Q1 demands a high-speed rectifying switch for optimum efficiency. Ensure that the diode’s average and peak current rating exceeds the average output current and peak inductor current. In addition, the diode’s reverse breakdown voltage must exceed the switch FET rating voltage of 40V. So, the ONSemi MBR0540 is recommended for TPS61170-Q1.
PAGE 18
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com Care must be taken when evaluating a ceramic capacitor’s derating under dc bias, aging and AC signal. For example, larger form factor capacitors (in 1206 size) have a resonant frequencies in the range of the switching frequency. So, the effective capacitance is significantly lower. The DC bias can also significantly reduce capacitance. Ceramic capacitors can lose as much as 50% of its capacitance at its rated voltage.
PAGE 19
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com where, TA is the maximum ambient temperature for the application. RθJA is the thermal resistance junction-to-ambient given in Power Dissipation Table. The TPS61170-Q1 comes in a thermally enhanced QFN package. This package includes a thermal pad that improves the thermal capabilities of the package. The RθJA of the QFN package greatly depends on the PCB layout and thermal pad connection. The thermal pad must be soldered to the analog ground on the PCB.
PAGE 20
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com C4 1 mF L1 10 mH VIN 9 V to 15 V C1 4.7 mF L2 10 mH TPS 61170 VIN ON /OFF DIMMING CONTROL D1 C2 4.7 mF VOUT 12 V/ 300 mA R1 87.6 kW SW CTRL FB COMP GND R2 10 kW C3 220 nF L1: TOKO#A915_Y-100M C1: Murata GRM21BR61E475K C2: Murata GRM21BR61E475K D1: ONsemi MBR0540T1 *L1, L2 can be replaced by 1:1 transformer Figure 21. 12V SEPIC (Buck-Boost) Converter L1 22 mH VIN 4.5 V to 15 V C2 1 mF D2 C1 4.7 mF VO 48 V/60 mA D1 TPS61170 C4 4.
PAGE 21
TPS61170-Q1 SLVSAX2 – SEPTEMBER 2011 www.ti.com C3 1 mF VO1 -48 V/30 mA C4 4.7 mF VO2 -24 V/40 mA D2 L1 33 mH VIN 3.3 V D1 C2 1 mF D3 D4 C1 4.7 mF VIN R1 23.7 kW C5 4.7 mF TPS61170 SW VIN CTRL FB 1 kW 1 kW 10 kW COMP GND Q1 10 nF L1: TOKO B992AS-330M C1: Murata GRM188R61A475K C2, C3: Murata GRM21BR71H105K C4, C5: Murata GRM32ER71H475K R2 1.24 kW D1 – D4: B140 Q1: BCM62B Q2: MMBT3904TT1 Q2 Vo2 = 1.23 x (R1/ R2); Vo1 = 2Vo2 Figure 23. –24V / –48V Buck-Boost Converter from 3.
PAGE 22
PACKAGE OPTION ADDENDUM www.ti.com 11-Apr-2013 PACKAGING INFORMATION Orderable Device Status (1) TPS61170QDRVRQ1 ACTIVE Package Type Package Pins Package Drawing Qty SON DRV 6 3000 Eco Plan Lead/Ball Finish (2) Green (RoHS & no Sb/Br) MSL Peak Temp Op Temp (°C) Top-Side Markings (3) CU NIPDAU Level-2-260C-1 YEAR (4) -40 to 125 RAP (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs.
PAGE 23
PACKAGE OPTION ADDENDUM www.ti.
PAGE 24
PACKAGE MATERIALS INFORMATION www.ti.com 25-Jun-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TPS61170QDRVRQ1 Package Package Pins Type Drawing SON DRV 6 SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) 3000 180.0 8.4 Pack Materials-Page 1 2.3 B0 (mm) K0 (mm) P1 (mm) 2.3 1.15 4.0 W Pin1 (mm) Quadrant 8.
PAGE 25
PACKAGE MATERIALS INFORMATION www.ti.com 25-Jun-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TPS61170QDRVRQ1 SON DRV 6 3000 210.0 185.0 35.
PAGE 26
PAGE 27
PAGE 28
PAGE 29
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.