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MC34844EP Scheda tecnica(PDF) 10 Page - Freescale Semiconductor, Inc |
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MC34844EP Scheda tecnica(HTML) 10 Page - Freescale Semiconductor, Inc |
10 / 62 page Analog Integrated Circuit Device Data Freescale Semiconductor 10 34844 ELECTRICAL CHARACTERISTICS STATIC AND DYNAMIC ELECTRICAL CHARACTERISTICS MC34844 Line Regulation (9) VIN=7.0 to 28 V IOUT/VIN -0.2 - 0.2 %/V Load Regulation (9) VLED = 8.0 to 65 V (all Channels) IOUT/VLED -0.2 - 0.2 %/V Slope compensation voltage ramp RSLOPE = 68 kΩ VSLOPE - 0.49 - V/ μs Current Sense Amplifier Gain ACSA - 9.0 - Current Sense Resistor RSENSE - 22 - m Ω OTA Transconductance GM - 200 - μS Transconductance Sink and Source Current Capability ISS - 100 - μA Output Voltage Precharge VHOLD 0.45 0.5 0.55 V FAIL PIN Off-state Leakage Current VFAIL = 5.5 V IFAIL_LEAK - - 5 μA On-state Voltage Drop ISINK = 4.0 mA VOL - - 0.4 V LED CHANNELS Sink Current ICHx Register = 255, RISET=5.1 k Ω 0.1%, PIN&NIN = Disabled, TA=25 °C ISINK 49 50 51 mA Regulated minimum voltage across drivers Pulse Width > 4.0 μs VMIN 675 750 825 mV Current Matching Accuracy IMATCH -2.0 - 2.0 % ISET Pin Voltage RISET=5.1 k Ω 0.1% VSET 2.017 2.048 2.079 V LED Current Amplitude Resolution 1.0 mA < ILED < 50 mA ILEDRES - 1.5 - % Off-state Leakage Current, All channels (VCH = 45 V) ICH_LEAK - - 10 μA PIN INPUT Voltage to Disable PIN mode VPIN_DIS 2.2 - - V PIN Bias Current PIN = VSET IPIN -2.0 - 2.0 μA Analog Dimming Current ICHx Register = 255, RISET=5.1 k Ω 0.1% PIN = VSET/2 PIN = VSET IDIM_PIN 23.75 47.50 25 50 26.25 52.50 mA Notes 9. Guaranteed by design Table 4. Static and Dynamic Electrical Characteristics (continued) Characteristics noted under conditions VIN = 12 V, VOUT = 42 V, ILED = 50 mA, PWM = VDC1, M/~S = VDC1, PIN & NIN = VDC1, -40 °C ≤ TA ≤ 105 °C, PGND = 0 V, unless otherwise noted. Characteristic Symbol Min Typ Max Unit |
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