MAX1620EEE+ Maxim Integrated Products, MAX1620EEE+ Datasheet
MAX1620EEE+
Specifications of MAX1620EEE+
Related parts for MAX1620EEE+
MAX1620EEE+ Summary of contents
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... LCDON QSOP ( ) ARE FOR MAX1621 ONLY. SMBus is a trademark of Intel Corp. ________________________________________________________________ Maxim Integrated Products For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. 1.8V to 20V Battery Input Voltage Automatic Disable when Display Logic ...
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Digitally Adjustable LCD Bias Supplies ABSOLUTE MAXIMUM RATINGS V to AGND ..............................................................-0. PGND to AGND ..................................................................±0.3V LCDON to AGND ....................................-0.3V to 30V BATT, LX, DHI, DLO to PGND.....................................-0. DOUT, FB, POL, POK, REF to AGND.........-0.3V ...
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Digitally Adjustable LCD Bias Supplies ELECTRICAL CHARACTERISTICS (continued 3.3V 10V 0°C to +85°C, unless otherwise noted.) DD BATT A PARAMETER DOUT Maximum Output Voltage (Note 3) DOUT Minimum Output Voltage (Note 3) DOUT Resolution ...
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Digitally Adjustable LCD Bias Supplies ELECTRICAL CHARACTERISTICS (V = 3.3V 10V -40°C to +85°C. Typical values are BATT A temperature range are guaranteed by design.) PARAMETER SWITCHING REGULATOR V Operating Range DD V ...
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Digitally Adjustable LCD Bias Supplies TIMING CHARACTERISTICS (V = 3.3V 10V -40°C to +85°C. Typical values are BATT A temperature range are guaranteed by design.) PARAMETER SYMBOL MAX1620 (Figure 1) Pulse Width High ...
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Digitally Adjustable LCD Bias Supplies _____________________________Typical Operating Characteristics (continued 10V 100µ BATT A EFFICIENCY vs. OUTPUT VOLTAGE 1.00 0.95 0.90 -20mA 0.85 -10mA 0.80 0.75 0.70 -26 -24 -22 -20 -18 ...
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Digitally Adjustable LCD Bias Supplies _____________________________Typical Operating Characteristics (continued 10V L1 = 100µ BATT LINE-TRANSIENT RESPONSE 2ms/div I = 20mA LOAD _______________________________________________________________________________________ = 22.3V +25°C, unless otherwise noted.) OUT A k-FACTOR ...
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Digitally Adjustable LCD Bias Supplies ______________________________________________________________Pin Description PIN NAME MAX1620 MAX1621 1 — DN — 1 SDA 2 — UP — 2 SCL 3 3 BATT SHDN 4 — SUS — POK 6 6 REF 7 7 ...
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Digitally Adjustable LCD Bias Supplies Figure 1. MAX1620 UP and DN Signal Timing START CONDITION SCL t HD:STA SDA t SU:STA Figure 2. MAX1621 SMB Serial-Interface Timing—Address • • • SCL • • • SDA Figure ...
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Digitally Adjustable LCD Bias Supplies _______________Detailed Description The MAX1620/MAX1621 are step-up power controllers that drive an external N-channel FET or NPN transistor to convert power from a 1.8V to 20V battery to a higher positive or negative voltage. They are ...
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Digitally Adjustable LCD Bias Supplies 2V TO 15V R8 10k D3 1N6263 (ANY SCHOTTKY) TO REF 3 BATT 5 POK MAX1620 MAX1621 C1 POL 4 5.5V 0.1 F SHDN (SUS (SDA) 2 ...
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Digitally Adjustable LCD Bias Supplies The MAX1620 controls the DAC counter with the UP and DN pins. A rising edge on UP increases V decrementing the counter and decreasing the DAC output voltage one step; a rising edge on DN ...
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Digitally Adjustable LCD Bias Supplies Table 1. MAX1621 Configuration Byte with REGSEL = 0 (write to POR BIT NAME STATE* Register Select. A zero in this bit writes the next two bits into the SUS register 7 REGSEL — and ...
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Digitally Adjustable LCD Bias Supplies MOST SIGNIFICANT ADDRESS BIT START CONDITION SCL SDA Figure 7. MAX1621 Serial-Interface Single-Byte Write Example (REGSEL = 0) MOST SIGNIFICANT ADDRESS BIT START CONDITION SCL SDA Figure 8. MAX1621 Serial-Interface Single-Byte Write Example (REGSEL = ...
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Digitally Adjustable LCD Bias Supplies MOST SIGNIFICANT ADDRESS BIT START CONDITION SCL SDA Figure 9. MAX1621 Serial-Interface Read Example Design Procedure __________and Component Selection The MAX1620/MAX1621 output voltage can be adjusted manually or via a digital interface. In addition, positive ...
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Digitally Adjustable LCD Bias Supplies Setting the Maximum Output Voltage The DAC is adjustable from steps, and 1LSB = 1.5V / 31. DAC adjustment adding R3 to the divider circuit (Figure 4). ...
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Digitally Adjustable LCD Bias Supplies LCDON typically drives an external PNP transistor, switching a positive V to the LCD. R7 limits the base OUT current in the PNP; R6 turns off the PNP when LCDON is floating. R6 and R7 ...
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Digitally Adjustable LCD Bias Supplies Diode Selection The high maximum switching frequency of 300kHz requires a high-speed rectifier. Schottky diodes, such as the MBRS0540, are recommended. To maintain high effi- ciency, the average current rating of the Schottky diode must ...
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Digitally Adjustable LCD Bias Supplies 12V R1 10k 360k D3 1N6263 (ANY SCHOTTKY) TO REF R2 100k 3 U1 BATT 5 POK MAX1620 MAX1621 C1 POL 4 5.5V 0.1 F SHDN ...
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Digitally Adjustable LCD Bias Supplies ________________________________________________________Package Information 20 ______________________________________________________________________________________ ...