Document
TS1910A
680kHz/1.2MHz High Voltage Boost Converter
SOP-8EP
Pin Definition: 1. COMP 8. SS 2. FB 7. FREQ 3. EN 6. VCC 4. GND 5. LX
General Description
The TS1910A is a high performance, high efficiency step up DC-DC Converter with integrated 2A. The TS1910A converter input voltage ranging from 2.6 to 5.5V. The Output voltage can be set up to 27V. The selectable frequency of 680kHz and 1.2MHz allows the use of small external inductors and capacitors and provides fast transient response. Current mode control with external compensation network makes it easy to stabilize the system and keep maximum flexibility. Programmable soft start function minimizes impact on the input power system. Internal power MOSFET with very low RDS(ON) provides high efficiency. The TS1910A automatically transits from PWM to PFM during light load condition further increasing efficiency. The converter also provides protection functions such as Current Limit and Thermal shutdown.
Features
● ● ● ● ● ● ● ● ● 2.6V to 5.5V operating input voltage range Adjustable output voltage range up to 27V Up to 3A output switch current 680K/1.2MHz Selectable Switching Frequency Programmable soft-start function External Compensation Network Current limit and Thermal shutdown protection Under voltage Lockout ≤1µA Shutdown Current
Application
● ● ● ● Digital Still Cameras Portable Electronics PDA’s and Palm-Top Computers Local Boost Regulator
http://www.DataSheet4U.net/
Ordering Information
Part No.
TS1910ACS RLG
Package
SOP-8EP
Packing
2.5Kpcs / 13” Reel
Note: “G” denotes for Halogen Free
Absolute Maximum Rating
Parameter
VCC Pin Voltage EN, FREQ,COMP,FB,SS, Pin Voltage LX Pin Voltage Power Dissipation Storage Temperature Range Operating Junction Temperature Range Thermal Resistance from Junction to case VLX PD TST TOP θJC
Symbol
VCC
Limit
GND - 0.3 to GND + 6 GND - 0.3 to VCC + 0.3 30 ( TJ-TA ) / θJA -65 to +150 -40 to +125 15
Unit
V V V mW ° C ° C ° C/W
Thermal Resistance from Junction to ambient θJA 40 ° C/W Note: θJA is measured with the PCB copper area of approximately 1.5 in2(Multi-layer). That copper area needs connect to exposed pad.
1/8
Version: A12
datasheet pdf - http://www.DataSheet4U.net/
TS1910A
680kHz/1.2MHz High Voltage Boost Converter
Electrical Specifications (Ta = 25oC, VIN=5V, EN=VIN, IL=0A unless otherwise noted) Characteristics Symbol Conditions Min Typ
Input Voltage range Under Voltage Lockout UVLO Hysteresis Step-Up Voltage Adjust Range Operating quiescent current Shutdown current Feedback Voltage FB Input Leakage Current Line Regulation Load Regulation Oscillator frequency FREQ high-level input voltage FREQ low-level input voltage FREQ input leakage current Soft Start Current N-channel MOSFET current limit MOSFET on-resistance (Note) EN high-level input voltage EN low-level input voltage EN Hysteresis EN input leakage current Maximum Duty Cycle LX Leakage Current Thermal Shutdown Thermal Shutdown Hysteresis Note: Guaranteed by design VCC UVLO UVLOhys VOUT ICCQ ISD VFB IFB-LKG REGLINE REGLOAD FOSC VFQ-IH VFQ-IL IFQ-LKG ISS ILIM RDS(on) VIH VIL ENhys IEN-LKG Duty ILXL TSD Thys VEN=GND or VIN VFB=0V VLX =25V, VFB=1.5V Duty=40%
http://www.DataSheet4U.net/
Max
5.5 2.6 -27 250 1 1.257 +100 --1500 850 -0.5 0.1 13 280 220 -0.4 0.1 -10 ---
Units
V V mV V µA µA V nA % % KHz V uA µA A mΩ V V mV µA % µA ° C
2.6 Rising --VCC+0.5 IOUT=0mA, VFB=1.5V VEN=0V VFB = 1.5V VIN=2.6 to 5.5V IOUT=20mA VIN=5V IOUT= 1mA to 0.7A FREQ=High FREQ=Low --1.219 -100 -900 500 2 -FREQ=GND -4 3 --1.0 ---85 ---VIN=3V, ISW =2A VIN=5V, ISW =2A
-2.35 -150 -150 0.1 1.238 0.01 0.2 0.3 1200 680 ---7 3.8 200 160 -200 0.01 90 -150 35
2/8
Version: A12
datasheet pdf - http://www.DataSheet4U.net/
TS1910A
680kHz/1.2MHz High Voltage Boost Converter
Block Diagram
VCC 7uA SS FB COMP
Soft Start
1.238V Reference
Error Amplifier Summing Comparator
Thermal Shutdown
Enable/ Disable
EN
LX Control and Driver Logic
N-MOS
FREQ SGND
Oscillator PGND
Slope Compensation
Current Sense
Pin Description
Pin Number
1 2 3 4 5 6 7 8
Pin Name
COMP FB EN GND LX VCC FREQ SS
Description
Compensation Pin Feedback Pin Enable Pin Ground Pin Switch Output Pin Power Input pin Frequency select pin. The power switch operates at 680kHz if FREQ is connected to GND and at 1.2MHz if FREQ is connected to VCC Soft start Pin. Connect a capacitor to GND
http://www.DataSheet4U.net/
3/8
Version: A12
datasheet pdf - http://www.DataSheet4U.net/
TS1910A
680kHz/1.2MHz High Voltage Boost Converter
Application Circuit
FREQ=High (Frequency=1.2MHz)
VIN=5V L1 4.7uH R3 4.7~100Ω C2 2*10uF C4 0.1uF U1 VCC 7 FREQ 3 EN 1 COMP R6 100K C7 100pF 6 LX 5 2 FB 4 GND 8 SS AX5510A C6 D1 B340A R2 C1 130K 220pF
VOUT=12V
R4 1M C8 1nF
C3 R8 15K 3*10uF
10nF
R2 VOUT = 1.238V X (1 + ------- ) R8 R8 Suggest 10K~30K VIN ≦ 4.5V, R3=10Ω VIN > 4.5V, R3=100Ω
http://www.DataSheet4U.net/
FREQ=Low (Frequency=680KHz)
VIN=5V L1 6.8uH R3 4.7~100Ω C2 2*10uF C4 0.1uF U1 VCC 7 FREQ 3 EN 1 COMP R7 10K R6 100K C7 100p.