Electronic Components Datasheet Search |
|
L6226PD Datasheet(PDF) 8 Page - STMicroelectronics |
|
L6226PD Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 22 page L6226 8/22 CIRCUIT DESCRIPTION POWER STAGES and CHARGE PUMP The L6226 integrates two independent Power MOS Full Bridges. Each Power MOS has an Rd- son=0.73ohm (typical value @ 25°C), with intrinsic fast freewheeling diode. Cross conduction protection is achieved using a dead time (td = 1 µs typical) be- tween the switch off and switch on of two Power MOS in one leg of a bridge. Using N Channel Power MOS for the upper transis- tors in the bridge requires a gate drive voltage above the power supply voltage. The Bootstrapped (Vboot) supply is obtained through an internal Oscillator and few external components to realize a charge pump circuit as shown in Figure 3. The oscillator output (VCP) is a square wave at 600kHz (typical) with 10V amplitude. Recommended values/part numbers for the charge pump circuit are shown in Table1. Table 1. Charge Pump External Components Values Figure 3. Charge Pump Circuit LOGIC INPUTS Pins IN1A, IN2A, IN1B, IN2B, ENA and ENB are TTL/ CMOS and uC compatible logic inputs. The internal structure is shown in Fig. 4. Typical value for turn-on and turn-off thresholds are respectively Vthon=1.8V and Vthoff = 1.3V. Pins ENA and ENB are commonly used to implement Overcurrent and Thermal protection by connecting them respectively to the outputs OCDA and OCDB, which are open-drain outputs. If that type of connec- tion is chosen, some care needs to be taken in driving these pins. Two configurations are shown in Fig. 5 and Fig. 6. If driven by an open drain (collector) struc- ture, a pull-up resistor REN and a capacitor CEN are connected as shown in Fig. 5. If the driver is a stan- dard Push-Pull structure the resistor REN and the ca- pacitor CEN are connected as shown in Fig. 6. The resistor REN should be chosen in the range from 2.2k Ω to 180KΩ. Recommended values for REN and CEN are respectively 100KΩ and 5.6nF. More infor- mation on selecting the values is found in the Over- current Protection section. Figure 4. Logic Inputs Internal Structure Figure 5. ENA and ENB Pins Open Collector Driving Figure 6. ENA and ENB Pins Push-Pull Driving TRUTH TABLE X = Don't care High Z = High Impedance Output CBOOT 220nF CP 10nF RP 100 Ω D1 1N4148 D2 1N4148 D2 CBOOT D1 RP CP VS VSA VCP VBOOT VSB D01IN1328 INPUTS OUTPUTS EN IN1 IN2 OUT1 OUT2 L X X High Z High Z H L L GND GND H H L Vs GND HLH GND Vs HHH Vs Vs 5V D01IN1329 ESD PROTECTION 5V 5V OPEN COLLECTOR OUTPUT REN CEN ENA or ENB OCDA or OCDB D02IN1355 5V PUSH-PULL OUTPUT REN CEN ENA or ENB D02IN1356 OCDA or OCDB |
Similar Part No. - L6226PD |
|
Similar Description - L6226PD |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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 |