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The TPS5100 is a triple PWM control circuit, primarily designed to compose the power supply for LCD display. Each PWM channel has own error amplifier, PWM comparator, dead-time control and output driver. The trimmed voltage reference, oscillator, undervoltage lockout and short circuit protection are common for all channels.
This device includes two boost exclusive circuits (ch1,3) and a buck-boost exclusive circuit (ch2). The operating requency is set with external resister and capacitor, and dead time is continuously adjustable form 0% to 100% duty cycle with resistive divider network. Soft start function can be implemented by adding a capacitor to dead time divider network. Two dead time control inputs are assigned for ch1,3 pair and ch2 individually and each dead time control input can be used to control on/off operation. TPS5100 can operate from 2.5 V supply voltage and ch1,3 pair and ch2 operate with reverse phase switching each other to achieve efficient operation in low power and battery powered system.
The TPS5100 is characterized for operation from 20°C to 85°C.
TPS5100 Features
·Low Voltage Operation . . . 2.5 V to 7 V ·Low Power . . . 3. 5 mA (f = 500 kHz, Duty = 50%) ·Internal Undervoltage Lockout Protection ·Internal Short Circuit Protection ·Wide Operating Frequency . . . 50 kHz to 1 MHz ·Internal Precision Reference . . . 1.25 V ±1% (25°C) ·On/Off Switch for CH1/3 Pair and Ch2 (see Function Table) ·0 to 100% Dead Time Control ·Totem Pole Output Stage ·Smal l Package . . . 16 Pin TSSOP
TPS5100 Connection Diagram
TPS5100IPWR Parameters
Technical/Catalog Information
TPS5100IPWR
Vendor
Texas Instruments
Category
Integrated Circuits (ICs)
PWM Type
Controller
Number of Outputs
3
Package / Case
16-TSSOP
Packaging
Tape & Reel (TR)
Duty Cycle
100%
Voltage - Supply
2.5 V ~ 7 V
Frequency-Max
1MHz
Buck
Yes
Boost
Yes
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Drawing Number
296; 4040064; PW; 8, 14, 16, 20, 24, 28
Operating Temperature
-20°C ~ 85°C
Lead Free Status
Contains Lead
RoHS Status
RoHS Non-Compliant
Other Names
TPS5100IPWR TPS5100IPWR
TPS51020 General Description
The TPS51020 is a multi-function dualsynchronous step-down controller for notebook system power. The part is specifically designed for high performance, high efficiency applications where the loss associated with a current sense resistor is unacceptable. The TPS51020 utilizes feed forward voltage mode control to attain high efficiency without sacrificing line response.Efficiency at light load conditions can be maintained high as well by incorporating autoskip operation. A selectable, Suspend to RAM (STR)supported, DDR option provides a one chip solution for all switching applications from 5-V/3.3-V supply to a complete DDR termination solution.