SI9122A_08 VISHAY [Vishay Siliconix], SI9122A_08 Datasheet
SI9122A_08
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SI9122A_08 Summary of contents
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Half-Bridge DC/DC Controller with Integrated Secondary Synchronous Rectification Drivers DESCRIPTION Si9122A is a half-bridge controller IC ideally suited to fixed telecom applications where high efficiency is required at low output voltages (e.g. < 3.3 V). Designed to operate within ...
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Si9122A Vishay Siliconix TECHNICAL DESCRIPTION Si9122A is a voltage mode controller for the half-bridge topology. With 100 V depletion mode MOSFET capability, the Si9122A is capable of powering directly from the high voltage bus to V through an external PNP ...
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ABSOLUTE MAXIMUM RATINGS Parameter V (Continuous (100 ms BST BST REF OSC Logic Inputs Analog Inputs HV Pre-Regulator Input Current (Continuous) Storage Temperature Operating Junction ...
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Si9122A Vishay Siliconix a SPECIFICATIONS Parameter Symbol Reference (3 Output Voltage I Short Circuit Current SREF Load Regulation dVr/dir Power Supply Rejection PSRR Oscillator Accuracy ( OSC h F Max Frequency d F Foldback Frequency ...
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SPECIFICATIONS Parameter Symbol Pre-Regulator V V Pre-Regulator Turn Off REG1 CC Threshold Voltage V REG2 V Undervoltage Lockout UVLO Hysteresis UVLOHYS UVLO Soft-Start I Soft-Start Current Output V Soft-Start Completion Voltage SS_COMP Shutdown V Shutdown V ...
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Si9122A Vishay Siliconix a SPECIFICATIONS Parameter Symbol Synchronous Rectifier (SRH, SRL) Drivers V Output High Voltage V Output Low Voltage t BBM1 t BBM2 f Break-Before-Make Time t BBM3 t BBM4 I Peak Output Source SOURCE I Peak Output Sink ...
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TIMING DIAGRAM FOR MOS DRIVERS V CC PWM GND GND GND V BST V MID D H GND V CC GND t t BBM1 BBM2 ...
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Si9122A Vishay Siliconix PIN CONFIGURATION Si9122ADQ (TSSOP-20 REG_COMP REF GND OSC INDET CS1 9 CS2 10 Top View ORDERING INFORMATION Part Number Si9122ADQ-T1-E3 Si9122ADLP-T1-E3 ...
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Bandgap V Reference REF 3 INDET C L_CONT Voltage Frequency Feedforward Foldback R OSC OSC Oscillator Clock 132 kΩ 60 kΩ REF Current Gain Control CS2 Loop + - Control CS1 100 mV ...
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Si9122A Vishay Siliconix Care needs to be taken if there is a delay prior to the external circuit feeding back to the V supply. To prevent excessive CC power dissipation within the advisable to use an external ...
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Current Limit Current mode control providing constant current operation is achieved by monitoring the differential voltage V the CS1 and CS2 pins, which are connected to a current sense resistor on the primary low-side MOSFET. In the absence of an ...
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Si9122A Vishay Siliconix TYPICAL CHARACTERISTICS 600 500 400 300 200 (kΩ) OSC f vs OSC OSC 10.0 9.5 9 mV/C 8.5 8.0 7 ...
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TYPICAL CHARACTERISTICS Temperature (°C) I vs. Temperature REG2 250 200 CC 150 100 200 400 V (mV ...
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Si9122A Vishay Siliconix TYPICAL CHARACTERISTICS 100 (kΩ) BBM t vs BBM BBM BBM1 ...
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TYPICAL CHARACTERISTICS BBM1 BBM2 BBM2 3.5 4.5 5.5 V (V) INDET t vs. V ...
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Si9122A Vishay Siliconix TYPICAL WAVEFORMS SRL 10 V/div /div OUT D 10 V/div L CS2 50 mV/div 2 µs/div Figure 7. Foldback Mode V/div V/div CC 2 ms/div Figure 9. V ...
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TSSOP: 20-LEAD (POWER IC ONLY E 1.00 DIA. 1.00 (14_) 0. ∝ 1.00 (14_) DETAIL ‘A’ (SCALE: 30/1) (VIEW ROTATED 90_ C.W.) e ...
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PowerPAKr MLP65-18/20 (POWER IC ONLY) D D/2 -A- E/2 E Index Area D/2 E/2 TOP VIEW A // ccc C 0. e/2 Terminal Tip e 5 EVEN TERMINAL SIDE DETAIL B Document Number: 73182 15-Oct-04 Index Area ...
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Package Information Vishay Siliconix PowerPAK MLP65-18/20 (POWER IC ONLY 18/20 PITCH: 0.5 mm, BODY SIZE: 6.00 x 5.00 MILLIMETERS* Dim Min A 0.80 A1 0.00 A2 0.00 A3 aaa − b 0.18 bbb − C’ − ccc − ...
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... Parameters provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s technical experts. Product specifications do not expand or otherwise modify Vishay’ ...