Features: Complete PWM Power Control Circuitry Precision Reference:2.5V ± 1% (25 )Under-Voltage Lockout (UVLO) ProtectionOpen Drain OutputOutput Short Circuit ProtectionLow Dissipation Current:1.6mA Dead-Time Control:0 % to 100%Wide Operating Frequency: 10kHz to 800kHzVDD Range:4.0V to 14.0VPinout...
AAT1343: Features: Complete PWM Power Control Circuitry Precision Reference:2.5V ± 1% (25 )Under-Voltage Lockout (UVLO) ProtectionOpen Drain OutputOutput Short Circuit ProtectionLow Dissipation Current:1.6mA...
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CHARACTERISTICS |
SYMBOL |
VALUE |
UNIT |
Supply Voltage |
VDD |
14.0 |
V |
Input Voltage ( IE − , DTC) |
VI |
VDD |
V |
Output Voltage |
VO |
VDD + 0.3 |
V |
Output Current |
IO |
120 |
mA |
Operating Free-Air Temperature Range |
TC |
− 20 to + 85 |
|
Storage Temperature Range |
Tstorage |
− 45 to + 125 |
|
Power Dissipation |
Pd |
500 |
mW |
The AAT1343 provides an integrated two-channel pulse-width-modulation (PWM) solution for the power supply of DC-DC system; this device offers the systems engineer flexibility to tailor-make the power supply circuitry for specific applications.
Each channel contains its own error amplifier, PWM comparator, deadtime control (DTC) and output driver. The under-voltage protection, oscillator, short circuit protection and voltage reference circuit are the common features for these two channels.
Both channels of AAT1343 can be used for DC-DC converter operations including step-up, step-down, and inverting. Dead-time control can be set to provide 0% to 100% dead-time through a resistive divider network. Soft-start can be implemented by paralleling the DTC resistor with a capacitor. Two dead-time control inputs are assigned for channel 1 (CH1) and channel 2 (CH2) individually, and dead-time control inputs can be used to control on / off operation.
With a minimal number of external components, the AAT1343 offers a simple and cost effective solution.