Product Status: 量産中
OVERVIEW
The ISL6753 is a high-performance, low-pin-count alternative, zero-voltage switching (ZVS) full-bridge PWM controller. Like the ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETS are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and lightload performance with less complexity in a lower pin count package.
This advanced BiCMOS design features low operating current, adjustable oscillator frequency up to 2MHz, adjustable soft-start, internal over temperature protection, precision deadtime and resonant delay control, and short propagation delays. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
This advanced BiCMOS design features low operating current, adjustable oscillator frequency up to 2MHz, adjustable soft-start, internal over temperature protection, precision deadtime and resonant delay control, and short propagation delays. Additionally, Multi-Pulse Suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.
KEY FEATURES
- Adjustable Resonant Delay for ZVS Operation
- Voltage- or Current-Mode Operation
- 3% Current Limit Threshold
- 175µA Startup Current
- Supply UVLO
- Adjustable Deadtime Control
- Adjustable Soft-Start
- Adjustable Oscillator Frequency Up to 2MHz
- Tight Tolerance Error Amplifier Reference Over Line, Load, and Temperature
- 5MHz GBWP Error Amplifier
- Adjustable Cycle-by-Cycle Peak Current Limit
- Fast Current Sense to Output Delay
- 70ns Leading Edge Blanking
- Multi-Pulse Suppression
- Buffered Oscillator Sawtooth Output
- Internal Over Temperature Protection
- Pb-Free Plus Anneal Available and ELV, WEEE, RoHS Compliant
PARAMETRICS
Parameters
ISL6753
Basic Information
Production Status
量産中
iSimモデル
YES
トポロジ
Zero-Voltage-Switching (ZVS)
トポロジ特性
Full-Bridge ZVS
制御モード
Voltage, Peak Current, or Average Current Mode
UVLO立ち上がり (V)
8.75
UVLO立ち下がり (V)
7
VBIAS (V) (max)
20
無負荷動作電流
11 mA (typ), 15.5 mA (max)
PWM出力数
4
FETドライバ最大出力電流
10 mA
最大デューティサイクル (%)
99
認定レベル
Standard
サンプル提供
YES
温度範囲
-40 to +105
ブロック図
