 |
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
|
Motor de Búsqueda de Datasheet de Componentes Electrónicos |
|
TEA1202 Datasheet(PDF) 5 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
TEA1202 Datasheet(HTML) 5 Page - NXP Semiconductors |
|
|
5 / 24 page  2000 Jun 08 5 Philips Semiconductors Objective specification Battery power unit TEA1202TS PINNING SYMBOL PIN DESCRIPTION LX1 1 inductor connection 1 SHDWN0 2 DC/DC shut-down input SHDWN2 3 LDO2 shut-down input UPOUT/DNIN 4 up mode: DC/DC output; down mode DC/DC input ILIM 5 current limiting resistor connection OUT1 6 LDO1 output FB1 7 LDO1 feedback input GND 8 internal supply ground FB2 9 LDO2 feedback input OUT2 10 LDO2 output IN2 11 LDO2 input LBI2 12 low battery detector input 2 LBI1 13 low battery detector input 1 LBO 14 low battery detector output Vref 15 reference voltage FB0 16 DC/DC feedback input GND0 17 DC/DC converter ground SYNC/PWM 18 synchronization clock input or PWM-only selection input U/D 19 conversion mode selection input LX2 20 inductor connection 2 handbook, halfpage TEA1202TS MGU060 1 2 3 4 5 6 7 8 9 10 LX1 SHDWN0 SHDWN2 UPOUT/DNIN ILIM OUT1 FB1 GND FB2 OUT2 LX2 U/D SYNC/PWM GND0 FB0 Vref LBO LBI1 LBI2 IN2 20 19 18 17 16 15 14 13 12 11 Fig.2 Pin configuration. FUNCTIONAL DESCRIPTION Control mechanism The TEA1202TS DC/DC converter is able to operate in PFM (discontinuous conduction) or PWM (continuous conduction) operating mode. All switching actions are completely determined by a digital control circuit which uses the output voltage level as its control input. This novel digital approach enables the use of a new pulse width and frequency modulation scheme, which ensures optimum power efficiency over the complete range of operation of the converter. When high output power is requested, the device will operate in PWM (continuous conduction) operating mode. This results in minimum AC currents in the circuit components and hence optimum efficiency, minimum costs and low EMC. In this operating mode, the output voltage is allowed to vary between two predefined voltage levels. As long as the output voltage stays within this so-called window, switching continues in a fixed pattern. When the output voltage reaches one of the window borders, the digital controller immediately reacts by adjusting the pulse width and inserting a current step in such a way that the output voltage stays within the window with higher or lower current capability. This approach enables very fast reaction to load variations. Figure 3 shows the response of the converter to a sudden load increase. The upper trace shows the output voltage. The ripple on top of the DC level is a result of the current in the output capacitor, which changes in sign twice per cycle, times the internal Equivalent Series Resistance (ESR) of the capacitor. After each ramp-down of the inductor current, i.e. when the ESR effect increases the output voltage, the converter determines what to do in the next cycle. As soon as more load current is taken from the output the output voltage starts to decay. |
Número de pieza similar - TEA1202 |
|
Descripción similar - TEA1202 |
|
|
|
Enlace URL |
| Política de Privacidad |
| ALLDATASHEET.ES |
| ¿ALLDATASHEET es útil para Ud.? [ DONATE ] |
Todo acerca de Alldatasheet | Publicidad | Contáctenos | Política de Privacidad | Intercambio de Enlaces | Lista de Fabricantes 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 |
Spanish ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
