an8011s Panasonic Corporation of North America, an8011s Datasheet
an8011s
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an8011s Summary of contents
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... Voltage Regulators AN8011S 2-channel step-down, step-up, or inverting use DC-DC converter control IC Overview The AN8011S is a DC-DC converter control IC with two-channel output using the PWM method which allows 500 kHz high-speed control. Respecitve output operation can be completely synchronized with each other by using the same oscillation output ...
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... AN8011S Pin Descriptions Pin No. Symbol 1 CT Pin for connecting the oscillation frequency setting capacitor for triangular oscillation circuit. Frequecy of triangular oscillation is set by connecting a capacitor between this terminal and GND Resistor connection pin for setting the oscillation frequency of triangular oscillation circuit. Frequecy of triangular oscillation is set by connecting resistance between the ...
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... TC1 TC2 UON V HYS V IN- EH1 V EL1 EH2 V EL2 AN8011S Unit Unit V Min Typ Max Unit 2.413 2.5 2.588 2.8 3.1 3.4 V 100 200 300 ...
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... AN8011S Electrical Characteristics(continued Parameter PWM comparator 1/2 block High-level input threshold voltage Low-level input threshold voltage Input current Output 1/2 block Output frequency 1 Frequency 1 Output duty ratio 1 Output duty ratio 2 Output saturation voltage 1 Output saturation voltage 2 Output leak current 1 Frequency temperature characteristics 1 ...
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... ON/OFF Low-level input: standby state (V 0.8 V typ.) ON/OFF The total current consumption in the standby state can be suppressed to a value below The terminal for the inverted input of ch.2 error amplifier. Use a common-mode input ranging from 0 0 AN8011S I ...
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... AN8011S Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit REF REF I DTC2 U.V.L.O. output 6 DTC2 REF 8 8 GND FB2: The output terminal of ch.2 error amplifier typ. Its source current typ. and sink PWM2 current typ. CT Correct the frequency characteristics of the ...
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... IN 1 terminal. 12 FB1 IN 1: The terminal for the inverted input of ch.1 error amplifier. Use a common-mode input ranging from IN : The terminal for noninverted input of ch.1 14 error amplifier. Use a common-mode input IN ranging from AN8011S Description I determined by the tim- DTC 1.04 ( 0.67 V typ.) ...
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... AN8011S Terminal Equivalent Circuits (continued) Pin No. Equivalent circuit REF I CHG 4.2 k typ typ. 10k typ. 1. Latch typ Latch: Terminal for connecting the time constant setting capacitor for timer latch short-circuit protection circuit. The charge current I Latch about 80 A. ...
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... Maximum duty ratio temperature characteristics 100 40 20 DTC pin voltage 100 OUT 100 0 5 AN8011S 100 Ambient temperature Output duty ratio 500 k f 200 k OUT 0.5 1 1.5 DTC pin voltage (V) 9 ...
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... AN8011S Application Notes (continued) [2] Function descriptions 1. Reference voltage block This block is composed of the band gap circuit, and outputs the temperature compensated 2.5 V reference voltage to the V terminal. The reference voltage is stabilized when the supply voltage is 3 higher, and REF used as the operating power supply for the IC inside possible to take out a load current mA. Also, an overcurrent portection circuit is built in for the load, thereby protecting the IC from destruction when V terminal is short circuited ...
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... Once the under-voltage lock-out circuit (U.V.L.O.) is enabled, the latch circuit will not be reset unless the power supply is switched off. , the soft start function which gradually extends the on-period DTC with the reference voltage (1. all the time. When the load FB AN8011S S 11 ...
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... AN8011S Application Notes (continued) [3] The time constant setting method for timer latch type short-circuit protection circuit (continued) I CHG 80 A typ. 5 FB2 Latch comp. 12 FB1 1.85 V When the power supply is turned on, the output is considered to be short-circuited state, so that the error amplifier output becomes high-level, then SW1 becomes on state and the charging starts necessary to set the external capacitor start up the DC-DC converter output voltage before setting the latch circuit in the later stage ...
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... DTC DTC V CTH V DTC V CTL ON On Off 100 [%] 100 [%] ex.) When f OSC V CTH V 1.04 [V] CTL T Figure 6. Dead-time setting method AN8011S V CTH 1.4 V typ. V CTL 0.4 V typ. Charging Discharging T as shown in figure 6. Since DTC , V is adjusted by attaching the external T DTC 0.42 V, and 100 1.35 V. ...
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... AN8011S Application Notes (continued) [7] Timing chart 3.1 V typ. Lock-out release Power supply Triangular wave (CT) on Dead-time voltage ( Output transistor collector waveform(OUT) Figure 7. Operation waveform of PWM comparator Reference voltage (V ) REF Short-circuit protection input threshold level Comparator threshold level DTC terminal voltage Latch terminal voltage ...
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... Application circuit example 0.01 F 120 k Error amp. Latch V Unlatch pro. REF Short pro. U.V.L.O. Unlatch pro. OSC On/ Error Off amp. 120 k 0.01 F SBD 200 kHz Duty 75% PWM1 PWM2 SBD 25.5 k 4.5 k AN8011S 7 SBD 25 pin 4 15 ...
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... AN8011S Application Circuit Examples Application circuit example 2 2 Latch V REF U.V.L.O. OSC 16 500 0.01 F 100 V 120 k CC Error amp. PWM1 Unlatch pro. Short pro. Unlatch pro. PWM2 On/ Error Off amp. 120 k 0. 500 Voltage Regulators 3 25.5 k 0.75 V ...