TPS61088RHLR IC

Technical Specifications of TPS61088RHLR

Datasheet	TPS61088RHLR datasheet
Category	Integrated Circuits (ICs)
Family	PMIC – Voltage Regulators – DC DC Switching Regulators
Manufacturer	Texas Instruments
Series	–
Packaging	Tape & Reel (TR)
Part Status	Active
Function	Step-Up
Output Configuration	Positive
Topology	Boost
Output Type	Adjustable
Number of Outputs	1
Voltage – Input (Min)	2.7V
Voltage – Input (Max)	12V
Voltage – Output (Min/Fixed)	4.5V
Voltage – Output (Max)	12.6V
Current – Output	10A
Frequency – Switching	200kHz ~ 2.2MHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-VFQFN Exposed Pad
Supplier Device Package	20-VQFN (3.5×4.5)

TPS61088RHLR Introduction

Texas Instruments TPS61088RHLR is a very efficient, high-voltage boost converter. It is made to deliver a stable voltage from a single Li-Ion or Li-Polymer cell or two or three NiMH or alkaline cells. This manual will comprehensively introduce TPS61088RHLR, covering all its features, characteristics, and possible uses.

TPS61088RHLR Description

The integrated synchronous boost converter TPS61088 has 11-m power and 13-m rectifier switches. It’s ideal for energy-efficient mobility systems. The TPS61088 works with single-cell and dual-cell Lithium batteries since it accepts 2.7 V to 12 V input voltage. It can switch 10 A and output 12.6 V. The TPS61088 maintains output voltage with adaptive constant off-time peak current management. When under moderate to high load, the TPS61088 switches to PWM mode.

The MODE pin works two ways when the device’s load is low. Forced pulse-width modulation (PFM) mode helps developers avoid low switching frequency issues and boost efficiency. The PWM mode can transition from 200 kHz to 2.2 MHz with an additional resistor. The TPS61088 can alter its soft-start and switch peak current limits. Overvoltage, overcurrent, and thermal shutdown are protected down to 13.2V. TPS61088’s 20-pin VQFN package is 4.50mm by 3.50mm.

TPS61088RHLR Features

• 7-V to 12-V input voltage range.
• a range of output voltages from 4.5 V to 12.6 V.
• Current with a 10-A switch.
• At VIN = 3.3 V, VOUT = 9 V, and IOUT = 3 A, the efficiency is up to 91%.
• 0-A current into the VIN pin when the computer is turned off.
• Peak current limit switch with a programmable resistor.
• The switching frequency can be changed from 200 kHz to 2.2 MHz.
• Programmable soft start.
• Protection against overvoltage at 13.2 V.
• Cycle-by-cycle protection against too much current.
• Turning off the heat.
• 50-mm × 3.50-mm 20-pin VQFN package.

Detailed Description

With an 11-m power switch and a 13-m rectifier switch, the fully integrated synchronous boost converter TPS61088 can get a lot of power from a single-cell or two-cell Lithium battery. The device can put 12.6 V and 30 W from a single-cell Lithium battery. An adaptive continuous off-time peak current control architecture controls the TPS61088’s output voltage. The TPS61088 uses almost constant frequency pulse width modulation when the load is medium to heavy (PWM).

Using an external resistor, the switching frequency in PWM mode can be changed from 200 kHz to 2.2 MHz. The MODE pin chooses between two operation modes when the load is light. The TPS61088 works in pulse frequency modulation (PFM) mode when the MODE pin is disconnected. When there isn’t much load, PFM mode works well. When MODE is shorted to ground, the TPS61088 works in forced PWM mode (FPWM). Low switching frequency causes noise and other problems that the FPWM mode solves.

The TPS61088 uses a cycle-by-cycle current limit to prevent overloading during boost switching. Switch peak external resistors set current limits. External loop correction on the TPS61088 lets the inductors and output capacitors change. With low output capacitance, the adaptive off-time peak current management method improves transient line and load response.

Feature Description

● Enable and Start-up

The TPS61088 has a soft start feature that can be adjusted, so the startup current doesn’t get too high and cause damage. During startup, steady current charges an external capacitor connected to the SS pin, which gradually raises the internal positive input of the error amplifier. When the EN pin is pulled high, the soft-start capacitor CSS is charged at a steady rate of about 5 A. The voltage at the SS pin is compared to the internal reference voltage of the error amplifier, which is 1.204 V. The lower value is then sent to the error amplifier’s internal positive input.

As the voltage on the SS pin goes up, the error amplifier’s output also goes up (which determines the peak value of the inductor current?). The soft-start phase is over when the voltage at the SS pin is higher than the internal reference (1.204 V). When the capacitance at the SS pin is raised, the soft-start time and output voltage rise gradually. For most things, all you need is a 47-nF capacitor. You must pull the EN pin low to send the soft-start capacitor to the ground.

● Undervoltage Lockout (UVLO)

When the input voltage is low, the UVLO circuit protects the device and the battery from being used too quickly. The TPS61088 can work with both the VIN UVLO and the VCC UVLO. When the voltage on the VIN pin drops below the UVLO threshold, which is usually set at 2.4 V, the device stops switching (VIN UVLO). When the voltage on the VIN pin goes up to 200 mV above the VIN UVLO, the device starts to work. Also, it turns off when the voltage at the VCC pin falls below the UVLO threshold, which is usually 2.1 V.

● Overvoltage Protection

After the TPS61088 detects that the VOUT pin’s output voltage has risen over 13.2 V (typical value), it will not switch again until the VOUT pin’s voltage has fallen below the hysteresis value. This feature protects the output and linked circuits from dangerously high voltage levels.

● Thermal Shutdown

Using a thermal shutdown can prevent damage from overheating and power loss. Most of the time, the thermal shutdown happens when the junction temperature reaches 150 degrees Celsius. When the thermal shutdown is activated, the device won’t switch until the junction temperature drops to a safe level, usually below 130 degrees Celsius.

Application Information

The TPS61088 can provide more than 30 W of power at a maximum output voltage of 12.6 V and a switching current of 10 A. The TPS61088 uses pulse-width modulation (PWM) at a nearly constant frequency when under a heavy load. Depending on the load, the converter can switch between PFM and forced PWM operation. PFM mode is more efficient overall, but PWM mode is quieter because the switching frequency is always the same.

The converter uses adaptive continuous off-time peak current management to get a low output capacitance and a high transient response from the line and load. The TPS61088 can work with many combinations of inductor and output capacitors by using external loop correction. The switching frequency can be set anywhere between 200 kHz and 2.2 MHz.

Conclusion

In conclusion, TPS61088RHLR is an excellent choice for high voltage boost converter applications that require high efficiency and low quiescent current. Its adjustable output voltage and small package size make it versatile for many battery-powered applications. However, to ensure reliable and efficient performance, it is crucial to consider input voltage, output voltage, output current, capacitors, inductors, PCB layout, and thermal considerations during the design process. At ICRFQ, we offer competitive prices on high-quality electronic parts like TPS61088RHLR, and our team is always ready to help with any questions or orders. So, don’t hesitate to contact us for assistance with your electronic parts needs.

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