データシートサーチシステム |
|
LM25115A データシート(PDF) 3 Page - Texas Instruments |
|
|
LM25115A データシート(HTML) 3 Page - Texas Instruments |
3 / 26 page LM25115A www.ti.com SNVS501B – FEBRUARY 2007 – REVISED APRIL 2013 PIN DESCRIPTIONS Pin Name Description Application Information 1 CS Current Sense amplifier positive input A low inductance current sense resistor is connected between CS and VOUT. Current limiting occurs when the differential voltage between CS and VOUT exceeds 45mV (typical). 2 VOUT Current sense amplifier negative input Connected directly to the output voltage. The current sense amplifier operates over a voltage range from 0V to 13.5V at the VOUT pin. 3 AGND Analog ground Connect directly to the power ground pin (PGND). 4 CO Current limit output For normal current limit operation, connect the CO pin to the COMP pin through a diode. CO pin is connected to ground through a resistor in series with a capacitor to provide adequate control loop compensation for the current limit gm amplifier. Leave this pin open to disable the current limit function. 5 COMP Compensation. Error amplifier output COMP pin pull-up is provided by an internal 300uA current source. 6 FB Feedback. Error amplifier inverting input Connected to the regulated output through the feedback resistor divider and compensation components. The non-inverting input of the error amplifier is internally connected to the SS pin. 7 TRK/SS Tracking/Soft-start control Non-inverting input to error amp with 15 µA pull-up current source. Can be used with capacitor for soft-start or tied to external divider of a master output for tracking. TRK/SS is the reference input to the amplifier when the voltage applied to the pin is < 0.75V. For higher inputs, the internal reference controls the amplifier. 8 RAMP PWM Ramp signal An external capacitor connected to this pin sets the ramp slope for the voltage mode PWM. The RAMP capacitor is charged with a current that is proportional to current into the SYNC pin. The capacitor is discharged at the end of every cycle by an internal MOSFET. 9 SYNC Synchronization input A low impedance current input pin. The current into this pin sets the RAMP capacitor charge current and the frequency of an internal oscillator that provides a clock for the free-run (DC input) mode . 10 PGND Power Ground Connect directly to the analog ground pin (AGND). 11 LO Low-side gate driver output Connect to the gate of the low-side synchronous MOSFET through a short low inductance path. 12 VCC Output of bias regulator Nominal 7V output from the internal LDO bias regulator. Locally decouple to PGND using a low ESR/ESL capacitor located as close to controller as possible. 13 HS High-side MOSFET source connection Connect to negative terminal of the bootstrap capacitor and the source terminal of the high-side MOSFET. 14 HO High-side gate driver output Connect to the gate of high-side MOSFET through a short low inductance path. 15 HB High-side gate driver bootstrap rail Connect to the cathode of the bootstrap diode and the positive terminal of the bootstrap capacitor. The bootstrap capacitor supplies current to charge the high-side MOSFET gate and should be placed as close to controller as possible. 16 VBIAS Supply Bias Input Input to the LDO bias regulator and current sense amplifier that powers internal blocks. Input range of VBIAS is 4.5V to 30V. Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM25115A |
同様の部品番号 - LM25115A |
|
同様の説明 - LM25115A |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |