AH5798-WTG-7 Diodes Inc, AH5798-WTG-7 Datasheet - Page 3

• Manufacturer Part Number: AH5798-WTG-7
• Description: IC FAN MOTOR DRVR BLDC TSOT23-5
• Manufacturer: Diodes Inc

Specifications of AH5798-WTG-7

• Applications: Fan Motor Driver, Brushless (BLDC)
• Number Of Outputs: 1
• Current - Output: 300mA
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 105°C
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operational Type: Single Phase Hall Effect Latch Smart Fan Motor Controller
• Operating Supply Voltage: 6 V
• Supply Current: 5 mA
• Operating Point Min/max: 10 G to 50 G
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Supply Voltage (min): 1.8 V
• Supply Voltage (max): 5.5 V
• Maximum Output Current: 800 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: AH5798-WTG-7DITR

Functional Block Diagram
Operating
Notes:
AH5798
Document number: DS32001 Rev. 2 - 2
Magentic
O2
O1
FG
2. In “Normal spinning”, the FG changes its state at each rising edge of O1.
3. When the motor locks with South pole at the Hall element, O2 is kept on “L” and O1 is a clock with Ton/Toff ratio. When motor
4. When “Re-start spinning” occurs, the motor speed ramps up to the “Normal Spinning” speed from zero. Speed ramp-up profile
locks with North pole at the Hall element, O1 is kept on “L”, O2 is a clock with Ton/Toff ratio.
depends on motor characteristics.
N
S
Vss
Vdd
Normal spinning
Sensor
Hall
Power
AMP
motor locked detected
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Automatic re-start
Shoutdown and
Ton
Lock detect,
Frequency
Generator
SINGLE PHASE HALL EFFECT LATCH SMART
3 of 11
Control
Logic
Mechanical lock
Toff
Soft Switching
Control
FAN MOTOR CONTROLLER
Full Bridge
Driver
“Re-start spinning”
motor locked cleared
FG
AH5798
O1
O2
© Diodes Incorporated
June 2010