 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
TPS40042DRCT Datasheet(PDF) 8 Page - Texas Instruments |
|
|
||||||||||||||||||||||||||||||
TPS40042DRCT Datasheet(HTML) 8 Page - Texas Instruments |
|
|
8 / 36 page  www.ti.com DEVICE INFORMATION TERMINAL CONFIGURATION 1 2 3 4 10 9 8 7 HDRV SW BOOT LDRV EN FB COMP VDD 6 GND 5 REFIN TPS40042 SLUS777 – NOVEMBER 2007 The package is an 10-pin SON (DRC) package. Figure 13. DRC Package Terminal Configuration (Top View) Table 1. TERMINAL FUNCTIONS TERMINAL I/O DESCRIPTION NAME NO. Input (bootstrapped) supply to the high-side gate driver for PWM enabling the gate of the high side FET to be driven above the input supply rail. Connect a ceramic capacitor from this pin to SW. This capacitor is charged from the VDD pin voltage through an internal switch. BOOT 8 I The switch is turned ON during the off time of the converter. To slow down the turn on of the external MOSFET, a small resistor (1 Ω to 3 Ω) may be placed in series with the bootstrap capacitor. See Applications Section to calculate the appropriate value. Output of the error amplifier and connection node for loop feedback components. The voltage at this pin determines the duty cycle for the PWM. Optionally, a resistor from this pin to ground is used to determine the voltage threshold used for short circuit protection. (See Application Section) COMP 4 O • Low threshold R = 2.4 k Ω, ±10% • Mid threshold R = not installed • High threshold R = 12 k Ω, ±10% Active low enable input allows ON/OFF operation of the controller. If power is applied to the TPS40042 while the EN pin is allowed to float high, the TPS40042 remains disabled (both EN 2 I external switches are held OFF). Only when the EN pin is pulled to 1.2 V below VDD is the TPS40042 allowed to start. An internal 100-k Ω resistor is connected between VDD and EN to provide pull up. Connect this pin to GND to bypass the enable function. Inverting input of the error amplifier. In closed loop operation, the voltage at this pin is at the same potential as the REFIN pin. A series resistor divider from the converter output to FB 3 I ground, with the center connection tied to this pin, determines the value of the regulated output voltage. This pin is also a connection node for loop feedback components. GND 6 Electrical ground connection for the device. This is the gate drive output for the high side N-channel MOSFET switch for PWM. It is HDRV 10 O referenced to SW and is bootstrapped for enhancement of the high-side switch. LDRV 7 O Gate drive output for the low-side synchronous rectifier (SR) N-channel MOSFET. Non-inverting imput to the error amplifier. A precision voltage must be applied to this pin before the TPS40042 is enabled. Since this input is connected directly to the non-inverting REFIN 1 I pin of the error amplifier, the quality of the voltage at this pin has a direct impact on the quality of the output voltage. Connection to the switched node of the converter and the power return for the upper gate driver. There should be a high current return path from the source of the upper MOSFET to SW 9 O this pin. It is also used by the adaptive gate drive circuits to minimize the dead time between upper and lower MOSFET conduction. Power input to the device. This pin should be locally bypassed to GND with a low ESR VDD 5 I ceramic capacitor of 1 µF or greater. Thermal pad used to conduct heat from the device. This pad should be tied externally to a PPAD ground plane. See Application Section for PC board layout information. 8 Copyright © 2007, Texas Instruments Incorporated Product Folder Link(s): TPS40042 |
Similar Part No. - TPS40042DRCT |
|
Similar Description - TPS40042DRCT |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
