Electronic Components Datasheet Search |
|
MAX17491GTA+ Datasheet(PDF) 7 Page - Maxim Integrated Products |
|
MAX17491GTA+ Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 12 page Detailed Description The MAX17491 single-phase gate driver, along with the MAX8736, MAX8786, or MAX17030 multiphase con- trollers, provide flexible multiphase CPU core-voltage supplies. The low driver resistance allows up to 7A out- put peak current. Each MOSFET driver in the MAX17491 can drive 3nF capacitive loads with only 9ns propagation delay and 4ns/8ns (typ) fall/rise times, allowing operation up to 3MHz per phase. Larger capacitive loads are allowable but result in longer prop- agation and transition times. Adaptive dead-time con- trol prevents shoot-through currents and maximizes converter efficiency while allowing operation with a vari- ety of MOSFETs and PWM controllers. An input under- voltage-lockout (UVLO) circuit allows proper power-on sequencing. PWM Input The drivers for the MAX17491 are disabled—DH and DL pulled low—if the PWM input remains in the midlevel window for at least 300ns (typ). Once the PWM signal is driven high or low, the MAX17491 immediately exits the low-current shutdown state and resumes active opera- tion. Outside the shutdown state, the drivers are enabled based on the rising and falling thresholds specified in the Electrical Characteristics. MOSFET Gate Drivers (DH, DL) The high-side driver (DH) has a 0.9 Ω sourcing resis- tance and 0.7 Ω sinking resistance, resulting in 2.2A peak sourcing current and 2.7A peak sinking current with a 5V supply voltage. The low-side driver (DL) has a typical 0.7 Ω sourcing resistance and 0.3Ω sinking resistance, yielding 2.7A peak sourcing current and 8A peak sinking current. This reduces switching losses, making the MAX17491 ideal for both high-frequency and high-output-current applications. Single-Phase Synchronous MOSFET Driver _______________________________________________________________________________________ 7 OUTPUT (VOUT) L1 0.36 μH MAX17491 PWM DH BST LX DL GND PAD PWM +5V BIAS SUPPLY SKIP SKIP VDD CBST 0.22 μF COUT 2x 330 μF 6m Ω CIN 2x 10 μF INPUT (VIN) CVDD 1.0 μF NL DL NH Figure 3. Typical MOSFET-Driver Application Circuit Table 1. Typical Components DESIGNATION QTY COMPONENT SUPPLIERS NH 1 per phase Siliconix Si4860DY NL 1–2 per phase Siliconix Si4336DY BST Capacitor (CBST) 1 per phase 0.1µF or 0.22µF ceramic capacitor Schottky Diode Optional 3A, 40V Schottky diode Inductor (L1) 1 per phase 0.36µH, 26A, 0.9m Ω power inductor Output Capacitors (COUT) 1–2 per phase 330µF, 6m Ω per phase Input Capacitors (CIN) 1–2 per phase 10µF, 25V X5R ceramic capacitors |
Similar Part No. - MAX17491GTA+ |
|
Similar Description - MAX17491GTA+ |
|
|
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 |