GA1706 Goodark Electronics, GA1706 Datasheet
GA1706
Related parts for GA1706
GA1706 Summary of contents
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... PRIMARY SIDE CONTROL IC FOR OFF-LINE BATTERY CHARGERS AP3706 General Description The GA1706 is a high performance AC/DC power sup- ply controller for battery charger and adapter applica- tions. The device uses Pulse Frequency Modulation (PFM) method to build discontinuous conduction mode (DCM) flyback power supplies. ...
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... This pin drives the base of external power NPN switch Ground The voltage feedback from the auxiliary winding The 5V output of the internal voltage regulator This pin sets the bias current inside GA1706 with an external resistor to GND This pin connects a bypass capacitor for CC function 2 Preliminary Datasheet ...
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... Jun. 2009 Rev pro OVP & OCkP Tonsec Tons Detector Vea COMP V+ R pfm_d Vea S t pfm_d LEB Delay 430ns COMP R 3.75V S 0.75*I Figure 3. Functional Block Diagram of GA1706 3 Preliminary Datasheet VCC Regulator & UVLO Bias CV_ctrl pfm Q Driver CC_ctrl Q VDD BIAS OUT GND ...
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... These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended periods may affect device reliability. Jun. 2009 Rev GA1706 - Part Number GA1706M- GA1706MTR- Internally limited -65 to 150 4 Preliminary Datasheet E1: Lead Free TR: ...
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Electrical Characteristics o (V =15V, T =25 C, unless otherwise specified Parameter UVLO SECTION Start-up Threshold Minimal Operating Voltage REFERENCE VOLTAGE SECTION BIAS Pin Voltage VDD Pin Voltage STANDBY CURRENT SECTION Start-up Current Operating Current DRIVE OUTPUT SECTION ...
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Typical Performance Characteristics 19.5 19.0 18.5 18.0 17.5 17.0 16.5 -40 - Ambient Temperature ( Figure 4. Start-up Voltage vs. Ambient Temperature 800 750 700 650 600 550 500 450 400 -40 - Ambient ...
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Typical Performance Characteristics (Continued) 120 110 100 = 100 150 200 250 Bias Resistor (k Figure 8. Start-up Current vs. Bias Resistor Jun. 2009 Rev ...
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... Operation Description Bridge Figure 10. Simplified Flyback Converter Controlled by GA1706 Figure 10 illustrates a simplified flyback converter controlled by GA1706. Constant Primary Peak Current The primary current ip(t) is sensed by a current sense resistor R as shown in Figure 10. CS The current rises up linearly at a rate of: ...
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... The GA1706 is designed to operate in discontinuous conduction mode (DCM) in both CV and CC modes. To avoid operating in continuous conduction mode Iout (CCM), the GA1706 detects the falling edge of the FB input voltage on each cycle 0.1V falling edge not detected, the GA1706 will stop switching. OVP & OCkP ...
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Operation Description (Continued) FB Typical Application Jun. 2009 Rev COMP COMP -0.7V Timer_8ms UVLO Figure 14. OVP and OCkP Function Block Figure 10. 5V/0.3A Output for LED power 10 Preliminary Datasheet pro Q ...
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Mechanical Dimensions Mechanical Dimensions 4.700(0.185) 5.100(0.201) 1.270(0.050) TYP 0.100(0.004) 0.300(0.012) 1.000(0.039) 0.330(0.013) 0.510(0.020) Jun. 2009 Rev SOIC-8 1.350(0.053) 1.750(0.069) 0.675(0.027) 0.725(0.029) 3.800(0.150) 4.000(0.157) 0.190(0.007) 1° 0.250(0.010) 5° 0.900(0.035) 11 Preliminary Datasheet Unit: mm(inch) 0.320(0.013) 5.800(0.228) 6.200(0.244) φ 0.800(0.031) ...