WM8310GEB/V Wolfson Microelectronics, WM8310GEB/V Datasheet - Page 281

• Manufacturer Part Number: WM8310GEB/V
• Description: POWER MANAGEMENT SUBSYSTEM, 169BGA
• Manufacturer: Wolfson Microelectronics

Specifications of WM8310GEB/V

• Supply Voltage: 7V
• No. Of Step-down Dc - Dc Converters: 4
• No. Of Ldo Regulators: 11
• Digital Ic Case Style: BGA
• No. Of Pins: 169
• No. Of Regulated Outputs: 13
• Operating Temperature Range: -40°C To
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Pre-Production
w
Under the circuit configuration above, the NTC bias resistors R
following equations:
For example, to select a 45°C Hot Battery threshold and a 0°C Cold Battery threshold, the applicable
resistance ratios are r
Assuming a 100kΩ NTC thermistor (at 25°C), then R
From the equations above, it follows that R
Assuming the E12 (100kΩ) value of R
R
R
BIAS
1
= (0.534 x R
= ((r
COLD
HOT
- r
= 0.4368 and r
BIAS
HOT
) - (r
) / 2.721) x R
HOT
x R
BIAS
COLD
25
, then R
)
BIAS
25
= 3.266.
= 104kΩ (nearest E12 value 100kΩ).
1
= 9.72kΩ (nearest E12 value 10kΩ).
25
= 100kΩ.
BIAS
and R
PP, December 2009, Rev 3.0
1
are calculated using the
WM8310
281