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HPR12 RegulatorThe HPR12/HNR12 are high-performance voltage regulators developed for audio applications where performance is especially critical. Their key performance characteristics surpass those of standard integrated circuits by several orders of magnitude. Kelvin sense connections allow point-of-load local regulation without the need for close physical placement.
The HxR12 series pass regulators are externally compensated transconductance amplifiers, with the load decoupling capacitor also serving as the compensation capacitor.
In a conventional emitter-output regulator, a constant-gain amplifier is placed around an emitter follower whose output impedance is low and changes inversely with load current. The dominant pole is established inside the voltage amplifier, while any load capacitance introduces an additional unwanted pole that reduces phase margin. As the output impedance becomes strongly dependent on current, the phase margin does as well.
This differs from a transconductance regulator, where the error voltage controls the output current. Dominant-pole compensation is achieved by the decoupling capacitor across the load. Stability requires a minimum load capacitance, and increasing that capacitance improves phase margin even further. Output impedance is determined as the inverse of transconductance, which is set by the transconductance of the difference amplifier and the Hfe of the pass device, both of which remain nearly constant with load. The benefit of this linear output impedance is especially important in power supply sensitive audio applications, where a non-linear supply response can introduce distortion.
Because the HxR12 regulators offer extremely wide bandwidth, care should be taken to connect the sense lines directly at the decoupling capacitor.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.
Applications
Preamplifiers and buffersRIAA input stagesPlayback head amplifiersPerformance upgrade for existing productsFeatures
Ultra-low noiseWide bandwidthExcellent ripple rejectionLow, load-independent output impedanceKelvin sense connectionsSize and pin compatible with TO-220 style regulators
SpecificationsOutput impedance: 50mΩ Max. input voltage: 60V Max. output current: 100mA Output Noise Voltage: 290nV Output voltage: 12VPower dissipation: 1W Ripple rejection: 110dB
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.