Designed for analog and digital satellite receivers, the TPS652353 is a monolithic voltage regulator with I2C interface; specifically to provide the 13-V to 18-V power supply and the 22-kHz tone signal to the LNB down converter in the antenna dish or to the multi-switch box. The device offers a complete solution with minimum component count, low power dissipation together with simple design and I2C standard interface.
The TPS652353 features high-power efficiency. The boost converter integrates a 140-mΩ power MOSFET running at 1-MHz or 500-kHz selectable switching frequency. Dropout voltage at the linear regulator is 0.8 V to minimize power loss. The TPS652353 provides multiple ways to generate the 22-kHz signal. Integrated linear regulator with push-pull output stage generates 22-kHz tone signal superimposed at the output even at zero loading. Current limit of linear regulator can be programmed by external resistor with ±10% accuracy. Full range of diagnostic read by I2C is available for system monitoring.
The TPS652353 has a special design at forced PWM mode to avoid the audible noise especially when VIN is higher or closer to the VLNB output.
The TPS652353 supports advanced DiSEqC 2.x standard with 22-kHz tone detection circuit and output interface.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TPS652353 | RUK (WQFN, 20) | 3.00 mm × 3.00 mm |
Changes from Revision C (January 2023) to Revision D (May 2023)
Changes from Revision B (May 2021) to Revision C (January 2023)
Changes from Revision A (December 2019) to Revision B (May 2021)
Changes from Revision * (December 2019) to Revision A (December 2019)
PIN | TYPE(1) | DESCRIPTION | |
---|---|---|---|
NO. | NAME | ||
1 | LX | I | Switching node of the boost converter |
2 | VIN | S | Input of internal linear regulator |
3 | VCC | O | Internal 6.3-V power supply. Connect a 1-μF ceramic capacitor from this pin to ground. When VIN is 5 V, connect the VCC pin to the VIN pin. |
4 | AGND | S | Analog ground. Connect all ground pins and power pad together. |
5 | TCAP | O | Connect a capacitor to this pin to set the rise time of the LNB output. |
6 | ISET | O | Connect a resistor to this pin to set the LNB output current limit. |
7 | EN | I | Enable this pin to enable the VLNB output. pull this pin to ground to disable the output. The output is then pulled to ground, and, when the EN pin is low, the I2C interface can be accessed. |
8 | FAULT | O | Open drain output pin, it goes low if any fault flag is set. |
9 | ADDR | I | Connect a different resistor to this pin to set different I2C addresses (see the I2C Address SelectionTable 7-4 table). |
10 | VCTRL | I | Voltage level at this pin to set the output voltage (see the Logic tableTable 7-3). |
11 | SDA | I/O | I2C compatible bidirectional data |
12 | SCL | I | I2C compatible clock input |
13 | EXTM | I | External modulation logic input pin that activates the 22-kHz tone output. The feeding signal can be 22-kHz tone or logic high or low. |
14 | DOUT | O | Tone detection output |
15 | DIN | I | Tone detection input |
16 | VLNB | O | Output of the power supply connected to satellite receiver or switch |
17 | VCP | O | Gate drive supply voltage and output of charge pump. Connect a capacitor between this pin and the VLNB pin. |
18 | BOOST | O | Output of the boost regulator and Input voltage of the internal linear regulator |
19 | GDR | O | Control the gate of the external MOSFET for DiSEqc 2.x support |
20 | PGND | S | Power ground for the boost converter |
— | Thermal Pad | — | The thermal pad must be soldered to the printed circuit board (PCB) for optimal thermal performance. Use thermal vias on the PCB to enhance power dissipation. |